The decay of Lindon's trees reflects an "inner reality" which Gil-galad describes as the "light of the Eldar fading." If this blight isn't halted, Middle-earth's Elves will diminish completely, and The Rings of Power presents this fate as tantamount to dying.
Gil-Galad is clear that the spirit of the elves is diminishing, as evidenced by the decaying tree of Lindon. According to him, if the elves don't get their hands on mithril, they will either have to catch an early ship to the Grey Havens or else wither away and die.
Elves are immortal but can be killed in battle, in which case they go to the Halls of Mandos in Aman for an afterlife. They may be restored by the Will of the Valar, and then go to live with the Valar in Valinor, like an Earthly Paradise, though just being in the place does not confer immortality, as Men supposed.
The Tree of Souls was a tree and artifact given by the gods of the Seldarine to the elves of Evermeet for the purpose of restoring elven realms in Faerûn. It preserved the souls of some ancient elves as well as the power of High Magic.
When elves die, their spirits travel to the Halls, where they rest for a time as disembodied shades. Most of them are then returned to corporeal form and rejoin all the other elves living in Valinor.
Put simply, the Elves can't return to Valinor in The Rings of Power because their work in Middle-earth is unfinished. There is far more context to the situation in Tolkien's writing, but The Rings of Power skipped The Silmarillion's complexities regarding Elves and the War of Wrath.
No, Galadriel / Artanis was not the last surviving elf born in Aman. Her cousin and kinslayer, prince Maglor(1), was born in Valinor too, if you go strictly by the people who survived all ages of Middle-earth and did not die and subsequently go to Halls of Mandos.
Unlike other races of Middle-earth, casual intercourse was not enough to conceive a child because, for Elves, it was a far more conscious effort that required, as Tolkien put it, a "share and strength of their being, in mind and in body." Furthermore, marriage and parenthood are not forced upon Elven people.
The Elves made the Three Rings to try to halt the passage of time, or as Tolkien had Elrond say, "to preserve all things unstained". This was seen most clearly in Lothlórien, which was free of both evil and the passage of time. The Three do not make their wearers invisible.
Jealous, Melkor enlisted the help of the giant spider-creature Ungoliant (the mother of Shelob) to destroy the Two Trees. Concealed in Unlight, Melkor struck each Tree with a spear and the insatiable Ungoliant devoured whatever life and light remained in them.
Elves are basically immortal beings who age into a state of ethereal hotness and then stop the clock. They live for millennia, so being pregnant for one hundred years is actually not that bad when you look at it that way. Both parents are also aware of the baby elf growing in the womb the whole time.
Are any of the elves who first awoke Cuiviénen still around by the time of LOTR? The oldest elf in LoTR is Círdan the Shipwright, the oldest Elf still remaining in Middle-Earth, who appears at the end of Return of the King to sail to Valinor.
In tying Arwen's fate to that of the One Ring, Jackson aimed to show that there is more at stake than just the trees and the innocent creatures, there is also the light of the world that can never be allowed to succumb to the dark.
By moving from Middle-earth to the Undying Lands, however, the Elves' hröa would age "apace with the fëar," thereby restoring their immortality. The Elves' fading is said to be a consequence of the darkness Morgoth brought to the realm.
Jus like the Two Trees and the Silmarils, mithril possesses the Light of Valinor, the land where elves can return to live for eternity with the Valar. Mithril is the physical manifestation of the very thing that makes elves ageless and wise.
While the date of Legolas's birth is unknown, he was likely born sometime after his grandfather was killed and his father took over the rule of the Woodland Realm. Like all Elves, Legolas is immortal. Elves do not die by natural causes; however, they can be killed in battle.
Thus, Galadriel's dark form in Jackson's The Lord of the Rings personified what would have occurred had the Lady of Lothlorien given in to temptation and taken the One Ring for herself. She would have succumbed to evil because the Ring was indomitable, even with her power.
The majority of her powers come from her Ring of Power, Nenya, the Ring of Water. The ring, also known by the names the White Ring and the Ring of Adamant, is one of the three Rings of Power given to the Elves of Middle-earth in the Second Age.
Dwarves: They were too stubborn to be dominated directly, but the rings inflamed their greed to the point where they would not willingly give away their rings, and certainly not once Sauron started making war on them.
Half-elves can have children of their own. When they form families with other half-elves, their offspring will be half-elves themselves. However, if a half-elf has children with someone of different ancestry, even a member of their parental races, the results can vary.
Are grown-ups allowed to intervene? Santa advises that no family member touch their Elf on the Shelf, but he does describe a few rare instances when an adult may use tongs or potholders to help an elf in an urgent situation.
Being one of the chief leaders of the Noldorin rebellion, Galadriel was not allowed to return and a ban was set upon her, to which she replied that she had no wish to do so.
Through her great-grandmother, Idril, Arwen was a descendant of King Turgon of the Noldor. Through her mother, she was the granddaughter of the Elf-queen Galadriel of Lothlórien. Through both of her parents, Arwen was a direct descendant of the ancient Elven House of Finwë.
Galadriel was one of the Ñoldor who came to Middle-earth wishing to see the lands and rule a realm of her own. She came with the second host of Elves from Aman with Fingolfin and Finrod. In Doriath, she and Celeborn fell in love and married.
