A scientist sets up an experiment to see how the amount of light affects plant growth. He grows one group of plants in full sunlight, one group under full sun for 3/4 of the day, one group under full sun for 1/2 of the day, and one group under sunlight 1/4 of the day. All the plants are exactly that same type and all receive an equal amount of water and the same type of light. At the end of the experiment he measures all the plants. What is the independent variable? Question 5 options: the amount of sunlight sunlight the color of the light the height of the plant