Question

a group of scientists wants to test the effect of humidity on plant growth. the scientists set up an experiment that exposes plants to different humidity levels and measures their growth over a specified amount of time. in this experiment, what is the independent variable? a time b plant growth c humidity d fertilizer

Explanation:

In an experiment, the independent variable is the factor that is deliberately changed or manipulated by the experimenter. Here, the scientists are changing the humidity levels to see its effect on plant growth. Time is a constant for measurement, plant growth is the dependent variable (affected by humidity), and fertilizer is not mentioned as a variable in this experiment setup.

Answer:

C. humidity