“Technically, elves are immune to the elements. They don’t get cold, they don’t die naturally, and they don’t get monkeypox.” [Telepathic Intruder, post 40]
They do get cold. Reread The Silmarillion.
You are correct about the last two. the Elder Children also need to breathe air.
I’ve read it twice actually. I should go back a read all of it again, however. This shit coming out of Amazon is making me want to.