Answer:
questions that help you look for grammar and spelling mistakes
Explanation:
I just finnished the quiz and I got this quistion right.
Hi, the correct option would be the third option - "the keys on the kitchen counter are mine". In all other examples "on the kitchen counter" has an adverbial meaning, and the third example is the only one where this phrase is used as an adjective.
That is a full answer on your question hope it helps