Question

multiple - choice question
what is the independent variable (the variable that is changed or varied) in the plant experiment?
amount of fertilizer
plant growth

Explanation:

In an experiment, the independent variable is the factor that is deliberately changed or manipulated. In a plant experiment, the amount of fertilizer can be controlled and varied by the experimenter, while plant growth is the dependent variable that is affected by the independent variable.

Answer:

A. Amount of fertilizer