The two poetic elements present in the provided stanza are:
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Alliteration - The repetition of the initial consonant sounds in words close to each other, such as in “silly” and “simpering,” as well as “sideways” and “sellout.”
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Consonance - The repetition of consonant sounds within or at the end of words in close proximity, which can be seen in words like “man,” “machine,” and “monstrously.”
So, the correct answers are Alliteration and Consonance.