If the options are metaphor, alliteration, allusion, and apostrophe, I believe the answer is metaphor, because the others don't fit.
Alliteration is the repetition of a consonant.
Allusion is reference to something or somebody outside of that literary work.
And apostrophe is the author speaking directly to somebody outside the poem, usually gods or a muse.
Skinny and they don’t eat much so they don’t get bloated
I believe “Is that blood on me or blush?” :)
Hey there!
The answer you are looking for is C.
Hope it helped!