food made by the plant water needed by the plant pollen for plant reproduction carbon dioxide for photosynthesis
I gave my students this multiple choice question: Vascular plants have tissue called xylem. Which of these is transported by the xylem?

Only one answer is correct among these 4 choices:
- food made by the plant
- water needed by the plant
- pollen for plant reproduction
- carbon dioxide for photosynthesis

Could you tell me which one is correct?

water needed by the plant