chose between these options all that apply (allusion, free verse, metaphore, rhythm)
While I nodded, nearly napping, suddenly there came a tapping,
As of some one gently rapping, rapping at my chamber door.
This quote is an example of rhythm, which is the pattern of stressed & unstressed syllables in spoken or written language, especially in poetry. There is a clear pattern of repetition of the -ing sound in these 2 lines. None of the other options apply to this quote.
Hope that helps!