Answer:
prepositional phrase
Step-by-step explanation:
Prepositional phrase is a phrase, a group of words, that begins with a preposition and, additionally, consists of at least a noun.
For example:
I left my phone in his backseat.
"in his backseat" is a prepositional phrase and it functions as a preposition of place, answering the question "where?"
I hope I understood your question right and that this helped.