A period! An appositive is a noun that comes after another noun to rename it or describe it. In the sentence, "the correct punctuation" is then redefined as "a period"
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I’m pretty sure the answer is b to brainstorm different ideas
Hamlet killed Polonius on accident, realizing that someone was listening to his conversation with his mother in a deranged state. This proves Hamlet to be "crazy", and turns Hamlet into a more disliked person among the kingdom.
No, "the" is not a preposition as it does not describe a place in which something is. "The" would be called an article, like "a" or "an".
The answer to your second question, therefore, is D. Joanna hid the gift behind the couch, as "behind" would be the preposition because it describes where the gift is.
I hope this helps!