Stacy wants to know if plants have the same phototropic reaction from artificial light as they do from natural light.

Make observations. Plants appear to grow toward natural sunlight.

Ask questions. Would plants grow toward an artificial source of light?

Construct the hypothesis, and make predictions. Plants will grow toward both sources of light.

Test the hypothesis. Use two identical plants. Place one plant on a windowsill in sunlight. Place the other plant near a desk lamp. Observe the growth of the plants for two weeks.

Analyze the results, and make a conclusion. After two weeks, determine whether both plants grew toward the light source.

Test and modify the experiment. Repeat the experiment if the experiment proved the hypothesis. If not, modify the hypothesis and design a new experiment.

Explanation:

correct answer is a. and d.