height of the plants weight of the soil amount of water used temperature of the room
I gave my students this multiple choice question: A student is investigating in which type of soil a plant will grow best. Which should the student measure to answer the question?

Only one answer is correct among these 4 choices:
- height of the plants
- weight of the soil
- amount of water used
- temperature of the room

Could you tell me which one is correct?

height of the plants