Final answer:
The line from Edgar Allan Poe's 'The Raven' uses rhyme as the poetic device, which is part of the poem's ABAB rhyme scheme.
Step-by-step explanation:
The poetic device Edgar Allan Poe uses in the line 'And the lamp-light o’er him streaming throws his shadow on the floor' from his poem The Raven is D. Rhyme. This is evident in the poem's adherence to a strict rhyme scheme, which is part of its recognized structure and contributes to the overall mood and rhythm of the piece. Furthermore, the rhyme here is with the word 'door' from the preceding line, which creates an ABAB pattern typical of the poem's stanzaic form. While other devices like meter and repetition are also present in The Raven, they do not directly relate to the quoted line.