Weegy: B) light color is the independent variable.
The independent variable is always the one which is controlled and varied by the experimenter.
The dependent variable is the one measured - in this case the growth of the plants.
To insure a fair test, [ a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens.
In your experiment A),B) &C) should all be kept ... (More)