A seed is planted from a tree. An offshore rig pumps oil. A car is filled with gasoline. An office is heated with coal.
I gave my students this multiple choice question: Which event helps to renew a resource?

Only one answer is correct among these 4 choices:
- A seed is planted from a tree.
- An offshore rig pumps oil.
- A car is filled with gasoline.
- An office is heated with coal.

Could you tell me which one is correct?

A seed is planted from a tree.