provide energy for consumers. depend on other organisms for shelter. break down dead animal matter. consume nutrients for energy.
I gave my students this multiple choice question: The primary reason that plants are important for an ecosystem is because they

Only one answer is correct among these 4 choices:
- provide energy for consumers.
- depend on other organisms for shelter.
- break down dead animal matter.
- consume nutrients for energy.

Could you tell me which one is correct?

provide energy for consumers.