Final answer:
Poe achieved the decision on the effect of the poem by creating a melancholy atmosphere and conveying a sense of hopelessness and despair.
Step-by-step explanation:
In this stanza of the poem 'The Raven,' Poe achieved the decision on the effect of the poem. According to 'The Philosophy of Composition,' he mentioned that his goal was to create a melancholy atmosphere and convey a sense of hopelessness and despair. The repetition of the word 'Nevermore' by the Raven adds to this effect and contributes to the overall theme of the poem.
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