to make sugar in the leaves to use starch from the stems to move water to the flowers to get nutrients through the roots
I gave my students this multiple choice question: The class puts the planters by the window so that the plants can get more sunlight. How do the tomato plants use sunlight?

Only one answer is correct among these 4 choices:
- to make sugar in the leaves
- to use starch from the stems
- to move water to the flowers
- to get nutrients through the roots

Could you tell me which one is correct?

to make sugar in the leaves