the division of cells in the plant the release of oxygen from the plant the absorption of carbon dioxide in the stem the transportation of nutrients from the roots
I gave my students this multiple choice question: As a corn plant ages, its leaves grow. Which process is directly responsible for the growth of these leaves?

Only one answer is correct among these 4 choices:
- the division of cells in the plant
- the release of oxygen from the plant
- the absorption of carbon dioxide in the stem
- the transportation of nutrients from the roots

Could you tell me which one is correct?

the division of cells in the plant