A is the control because it shows the normal environment in which an indoor plant would grow. 2. the variable is the amount of sun that shines on the plant. A has the window open with the sun shining through and b has the shades closed. 3. If a plant is denied sun, then it won't grow as well as a plant with partial sun. 5. A grew more and quicker then b 6. this is shown on the graph above
