The correct response is: Clauses include both a subject and a verb, while phrases do not.
Here's a brief explanation:
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Clause: A clause is a group of words that contains at least a subject and a verb. It can be independent (able to stand alone as a sentence) or dependent (cannot stand alone).
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Phrase: A phrase is a group of words that does not contain both a subject and a verb, meaning it cannot stand alone as a complete thought.
The other options do not accurately describe the differences between clauses and phrases.