To determine which literary device the author uses in the poem, one would need to analyze specific lines or stanzas from the poem itself. Here’s a brief overview of the options you've listed:
A. Alliteration: The repetition of initial consonant sounds in closely placed words.
B. Onomatopoeia: The use of words that imitate natural sounds (e.g., "buzz", "whisper").
C. Rhyme: The repetition of similar sounds at the end of lines or within lines, usually at the end of the line.
D. Metaphor: A comparison between two unlike things without using "like" or "as".
If you provide a specific excerpt from the poem, I can help you identify which literary device is present!