Astudent is measuring plant growth in an experiment. using the same species of plant, he places one plant in the dark and one in artificial light. he hypothesizes that, over time, the plant in the artificial light will grow to a greater extent than that in the dark. what is the independent variable in this experiment?

amount of food
plant growth over time
species of plant
type of light environment

Correct answer is - Type of light environment

Explanation:

An Independent variable is the variable or condition that is controlled or changed in research or experiment to check the effect on dependent variable.

Dependent variable is the variable in any experiment that is being measured or studied. Plant growth over time is dependent variable and therefore the independent variable is type of light environment in this experiment.

i believe it would be the lungs.

materials water oxygen those are the things i can think of in this moment.