Plants keep water in their roots. Plants release nitrogen into the soil. Plants provide shelter from the weather. Plants make sugar in the presence of light.
I gave my students this multiple choice question: Pat is learning how energy flows through an ecosystem. Pat understands that animals get energy from plants. What do plants do that allow animals to get energy from them?

Only one answer is correct among these 4 choices:
- Plants keep water in their roots.
- Plants release nitrogen into the soil.
- Plants provide shelter from the weather.
- Plants make sugar in the presence of light.

Could you tell me which one is correct?

Plants make sugar in the presence of light.