Alas is a very common formal word
you got the poem or do i have to search it up?
Answer: he describes how Stanley feels when he looks out the bus window
Explanation: because it says reveals details about the character as he looks out the bus windows so in terms of saying how does he feel what are his thoughts it does not say what is he sees and how he behaves it's just how he's feeling about the whole situation in the thoughts help with that as well
He set a giant boulder at the mouth of the cave.