Answer:
here, the poem enlightens a bitter truth theme about the relationship between human and nature. the poem expresses the words of a young boy who'd grown up with the nature only to see it dying as he grew up. this shows that as the human world expands and generations make revolutionary changes to the world, humans are destroying nature which cannot be rebuilt by humans. humans have lost
prioritizing the nature and forgotten it's necessity
If your black you are cool
The speaker’s mental state shifts more and more toward madness.
This is because as the poem closes, the word nevermore occurs in more and more depressing situations because it is the only word the raven can say, and the poet asks him questions to which that can be the only answer. These questions become maddening and more depressing as time goes by.