to collect pollen from other plants to make seeds to absorb water and plant nutrients from the soil to carry food and water to the rest of the plant to make food for the plant
I gave my students this multiple choice question: What is the main function of a plant stem?

Only one answer is correct among these 4 choices:
- to collect pollen from other plants to make seeds
- to absorb water and plant nutrients from the soil
- to carry food and water to the rest of the plant
- to make food for the plant

Could you tell me which one is correct?

to carry food and water to the rest of the plant