What is the purpose of the reversal in a Shakespearean sonnet?

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To confuse students and keep them from knowing what the poem means.
To show how the poet really feels about the subject.
To back out of a Shakespearean Theatre parking spot.
To finalize the rhyme scheme in the poem.

The purpose of the reversal in a Shakespearean sonnet is to shift the perspective or change the meaning of the previous lines, often leading to a surprising or unexpected conclusion. It is a key element in the structure of a sonnet and is used to bring about a twist or resolution in the poem.