Answer:
A. Napping
Explanation:
A prepositional phrase is a group of words containing a preposition, its object, and words modifying the object. Prepositions connect different elements of the sentence - nouns and pronouns to verbs and adverbs. Prepositions prepositional phrases usually start with are <em>to, of, about, at, before, after, by, behind, during, for, from, in, over, under</em>, and <em>with</em>. Prepositional phrases act as information givers that usually modify verbs or nouns.
In the following sentence, the prepositional phrase is <em>under the couch</em><em>, </em>modifying the gerund <em>napping</em><em>. </em>It gives us additional information about the location. Where does Marisol's puppy like napping? <em>Under the couch.</em>