Depends on what word is underlined. <em>Maria </em>is a noun, (<em>will</em>) <em>show </em>is a verb, <em>us </em>is a pronoun, <em>the </em>is a determiner, <em>pictures </em>is a noun, <em>she </em>is a pronoun, <em>took </em>is a verb, <em>while </em>is an adverb, <em>on </em>is a preposition, <em>vacation </em>is a noun.
Out of the following choices given, the sentence that contains an infinitive is "Heather wants to go to the store with us." The infinitive is "to go." The correct answer is A.
