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Normally omniscient (3rd person pov) provides insight about the character's thoughts and motives, but sometimes 1st person can be helpful to gain information about how the character views the situation... Sorry if this seems confusing at all.
If I’m understanding the question it uses both metaphors and alliteration in the poem which is uncommon because most poetry uses typical one literary device and not multiples at the same time
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medical textbook, medical encyclopedia, and i think the last one be magazine artical
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