Final answer:
The stanza from 'The Raven' indicates that the raven embodies the endless mourning and loss of the speaker for Lenore, showing that the speaker's grief will remain unlifted.
Step-by-step explanation:
In Edgar Allan Poe's philosophy of composition, he aimed to craft works that evoke a sense of beauty tied with melancholy. The stanza in question from The Raven illustrates that the raven is emblematic of perpetual mourning and loss. It symbolizes that the speaker's sorrow for Lenore will never lift, as implied by the raven's repeated utterances of 'Nevermore.' The streaming lamp-light casting the raven's shadow suggests that the darkness of grief has a tangible presence, anchoring the speaker in a state of ongoing despair. Therefore, the correct answer is B: that the raven will forever be a symbol of the speaker's loss.