Which words in the sentence make up the adverb phrase? while the children take naps, the parents read in the living room. a. while the children b. read in c. in the living room d. the parents

The correct answer is C) in the living room. An adverb usually denotes place, or time, of the action happening. So, where do the parents read? - In the living room. Since there is no verb here, it is a phrase, if it had a verb, it would be a clause.
A is a fragment.
B is also a fragment.
D is a noun phrase.