Read the sentence below. select the prepositional phase. then determine whether the phrase is an adjective phrase or an adverb phrase.
under-inflated tires drag on the road and reduce fuel efficiency.
prepositional phrase: (on the road, reduce dual efficiency, and or under-inflated tires drag)
type of phrase: (adjective or adverb)

Prepositional Phrase: On the road. A prepositional phrase is a combination od a preposition and a complement, which can be a noun phrase, an adverb phrase etc. The preposition in this sentence is 'On'

Type of Phrase: Adverb phrase. The function of the adverb is to answer questions like when, how or where. In this case, where ? - On the road

explanation:

if you’re a fan of chocolate, every occasion is right for this treat. feeling down? eat some chocolate. celebrating? eat some more. want to show your valentine how special you think your sweetheart is? offer up chocolate!   people have been enjoying chocolate as a food, drink and medicine for thousands of years. the ancient maya and aztecs called chocolate kakaw and used it as medicine. they also made chocolate offerings to their gods. chocolate comes from the cacao (kuh-kow) tree, and its scientific name reflects its history. theobroma cacao translates to “cacao, food of the gods.” these days, chocolate is not just for deities. the treat has become popular around the world.

the answer is definitely d. sorry for a late response.