Answer:
Hello! This question is asking you to locate the prepositional phrase, preposition, and the object of the preposition in the sentence "Our walk on the bike trail was refreshing."
A prepositional phrase consists of a preposition and its object. So, in order to locate the prepositional phrase, we have to find the preposition and its object first.
A preposition can show direction ("a letter to him"), location ("at the movie theater"), or time ("by tomorrow"). It may also introduce an object ("a basket of apples"). They're typically followed by an object, which could be a noun (tomorrow), a noun phrase (the movie theater), or a pronoun (him).
In the sentence "Our walk on the bike trail was refreshing," the preposition is on and the object is the bike trail.
We've located our preposition and our object - now we need to find our prepositional phrase. Remembering that a prepositional phrase consists of a preposition and the object it affects, the prepositional phrase in this sentence would be "on the bike trail."
I hope this helps you! Have a great day.