Respuesta :
The answer to your question would be that the sentence that uses two prepositional phrases is the following one: The helicopter landed among the cars in the parking lot. The two prepositional phrases in the sentence are "among the cars" and "in the parking lot".
A prepositional phrase is a group of words made up of a preposition and its object. The object may be a noun, a pronoun, a gerund or a clause. What is more, a prepositional phrase functions as an adjective or adverb.