amount of water amount of light type of soil type of seed
I gave my students this multiple choice question: A student planted two bean seeds in two identical pots containing the same type of soil. He placed one pot in a closet and the other near a sunny window. Each day, he poured 15 milliliters of water into each pot. Which factor was different for the two pots?

Only one answer is correct among these 4 choices:
- amount of water
- amount of light
- type of soil
- type of seed

Could you tell me which one is correct?

amount of light