Coral reefs formed from calcium carbonate. Coal formed from plants that lived long ago. Limestone rocks quarried at Earth's surface. Carbohydrates stored in fruits and vegetables.
I gave my students this multiple choice question: Which represents a short-term storage for carbon?

Only one answer is correct among these 4 choices:
- Coral reefs formed from calcium carbonate.
- Coal formed from plants that lived long ago.
- Limestone rocks quarried at Earth's surface.
- Carbohydrates stored in fruits and vegetables.

Could you tell me which one is correct?

Carbohydrates stored in fruits and vegetables.