The sentence in which the underlined clause is an adverb clause is B. We can harness solar energy <u>wherever the sun shines.
</u>This is the only sentence where there is an adverb clause, the remaining sentences only have adjective clauses.<u>
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I think the answer is B. Alliteration
The central Idea of this speech is <em><u>to motivate Americans to strive for the development of their nation</u></em>. Kennedy believes that woul be happy and satisfied if they could live in a prosperous country. Kennedy's idea with this speech is to motivate Americans to work together to reach a common goal "to make America great again".
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