Answer : The most plausible theme in "The Raven" is that feelings of loss will never go away.
Explain
"The Raven" is a narrative poem written by American writer Edgar Allan Poe and first published in January 1845. The main theme of the poem is the exploration that the protagonist does into depression, grief and negativity. All of these are emotions that the main character does not seem to escape from, leading him into madness. His feeling of loss for his loved one, Leonore, consumes him and takes him to a dark place that defines his entire humor and existence.