Answer:
One way in which Edgar Allan Poe creates a unity of effect of melancholy in "The Raven" is With the repetition of "nevermore"
Explanation:
The poem is constructed in many aspects to generate contrast between light and darkness and at the end to leave in the reader a feeling of melancholy and sadness, the word nevermore was used in the base of its phonetic effect trough the sound of the letter o and r the same as in the name Lenore. This creates a melancholic echo in remembrance of the deceased
