Answer:
The correct answer is - different colors of light.
Explanation:
The independent variable is a variable or factor which is changed in a study or research to find what will be the change occur to the dependent variable. The manipulated factors or variables directly affect the dependent variable and help in concluding the result.
In this case, the variable that is affected is the growth of the plant while the variable that is manipulated or change is the color of the light so the independent variable would be different colors of light.
