Answer:
A. Napping
Step-by-step 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 to, of, about, at, before, after, by, behind, during, for, from, in, over, under, and with. Prepositional phrases act as information givers that usually modify verbs or nouns.
In the following sentence, the prepositional phrase is under the couch, modifying the gerund napping. It gives us additional information about the location. Where does Marisol's puppy like napping? Under the couch.