A cat eats a mouse. A deer eats a leaf. A hawk eats a mouse. A snake eats a rat.
I gave my students this multiple choice question: Which of the following events involves a consumer and producer in a food chain?

Only one answer is correct among these 4 choices:
- A cat eats a mouse.
- A deer eats a leaf.
- A hawk eats a mouse.
- A snake eats a rat.

Could you tell me which one is correct?

A deer eats a leaf.