Respuesta :
I have just took the test I didn't want to give you the answer before I was a 100% sure but I got it right anyway. It is PREPOSITIONAL. Prepositional Def. A modifying phrase consisting of a preposition and its object.
The underlined phrase "After several minutes" is prepositional phrase.
The prepositions are the words which show the relationship between the pronoun and the nouns. On the other hand, the prepositional phrase starts with the prepositions and end with the object of a preposition, having one or more modifiers to describe.
Prepositional phrase lacks either a verb or subject. It consists of a preposition and a noun or preposition and a pronoun. It can also act as an adverb or adjective. Adverb phrase refers to the group of words which qualifies adjectives, verbs or adverbs.
