Answer: Sue and Bob decided to separate their vegetable and flower gardens
There are two different seperates here. One is an adjective, the other is a verb.
In the answer above, separate is a verb. It is an action. Sue and Bob are separating their gardens. A synonym for this separate is “to split up”.
In the other, incorrect answers, separate is used as an adjective. It is describing. A synonym for this separate is “apart.”
1. cell phones should be allowed in the classroom.
Coordinating conjunctions connect phrases or clauses.
You would need the text to answer the question
