The two prepositional phrases of the given questions are: of sleep, due to homework, screentime, and early school start times.
Prepositional phrase
A prepositional phrase is a collection of words that includes a preposition, its object, and any words that alter the object. A prepositional phrase usually modifies a verb or a noun. Adverbial and adjectival prepositional phrases are the two types of prepositional phrases. A prepositional phrase is made up of at least one preposition and the object it rules. The object can be a noun, a gerund (a verb form that ends in "ing" and functions as a noun), or a phrase.
Teens need approximately nine hours of <u>sleep</u> each night; however, most teens don't
sleep nearly enough <u>due to homework, screen time, and </u><u>early school </u><u>start times</u>.
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