I think all besides the second to last and the second maybe
This is a theme because it is a concept NOT the story line. A plot summary is basically the story line as if you were writing a summary of the book or story.
Answer:
by the end of the poem, his unhappiness is caused by the realization that his grief is eternal. In the poem, the Raven's words "Nevermore" is significant.
Explanation:
i hope this helps if it dont sorry!!