A student planted bean seeds in 3 identical pots. She labeled the pots A, B, and C and she gave all of them 125mL of water. She places one pot in a sunny window, one under normal classroom lights, and one in a dark room. All of the plants were kept at the same temperature. At the end of 30 days she measured the height of the plants and got the following results. Identify the independent variable for the experiment above: * A student planted bean seeds in 3 identical pots. She labeled the pots A, B, and C and she gave all of them 125mL of water. She places one pot in a sunny window, one under normal classroom lights, and one in a dark room. All of the plants were kept at the same temperature. At the end of 30 days she measured the height of the plants and got the following results. Identify the independent variable for the experiment above: *