Answer:
It modifies the noun school.
Explanation:
It modifies the noun "school"
A prepositional phrase is a group of words that contains an object of a sentence, a preposition, and modifiers.
It is usually used to link one idea to another.
From the given example, the prepositional phrase "on the coast" modifies the noun "school".
the question is incomplete
Arizona is a very unique state that is rich in history.
who is sounds like your talking about a person.