Option B is correct, is a linking verb
A couplet is two consecutive rhyming lines BEST describes a couplet.
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I think the answer is nostalgic. Based from the excerpt, Richie missed
the old time when he was younger. He felt melancholy as he tried to
describe himself from his younger years. Rich felt that he had changed a
lot since then. He felt that he is more energetic when he was younger
compared to his present self.
Explanation:
auxiliary verbs help the main verb to express tense, voice and mood.
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