In order to offer a shortened, abridged version of the original passage. This allows audiences to get a general impression of the passage without reading the entire thing.
There are a couple of lines that are almost the same when it comes to alliteration and they should all be equally correct. "Slowly,
silently, now the moon", "Her
beams beneath the silvery thatch", "One
by one the casements catch", and "With
paws of silver sleeps the dog". Alliteration is when consecutive words in lines begin with the same group of letters and in the cases mentioned here it occurs regularly like "slowly silenty", or "casements catch".
The answer is totally man vs man<span />
Quenya is the language of the High Elves in Tolkien-lore. (I assume you had to read the Hobbit, maybe review it again, since this was a rather important point.) The trolls, goblins, and orcs mostly speak Black Speech, and the hobbits speak Westron.