Which of the following is an example of a prepositional phrase?

A prepositional phrase typically consists of a preposition followed by a noun or pronoun that serves as the object of the preposition. In the sentence provided, "to the store" is a prepositional phrase, where "to" is the preposition and "the store" is the object of the preposition. This phrase gives more information about where "she went," indicating the destination of her action.

The other options do not contain prepositional phrases. Instead, they are structured differently. For instance, the second option includes a verb and an adverb without any preposition. The third option presents a subject and a verb followed by an adverb, and the last option is a simple sentence that describes a subject with an adjective. None of these include a prepositional phrase, which is why the first option is the correct choice.