absorb minerals from the soil. change water vapor into a liquid. make sugar through photosynthesis. break down dead plant and animal matter.
I gave my students this multiple choice question: The main function of a producer in an ecosystem is to

Only one answer is correct among these 4 choices:
- absorb minerals from the soil.
- change water vapor into a liquid.
- make sugar through photosynthesis.
- break down dead plant and animal matter.

Could you tell me which one is correct?

make sugar through photosynthesis.