Answer:
The component that defines the work "The Raven" by Edgar Allan Poe as a poem, and not as a short work of fiction, is the resource of rhyme that is used constantly in the writing of the work. Thus, the author uses this resource at all times, both within the verses and between different verses, in such a way that the musicality of the writing is never lost; on the contrary, the careful use of words (and even the repetition of them) is aimed at keeping the rhythm of the poem from its beginning to its end.