Question

according to the diagram, which question is being tested? do flowering plants grow taller in red, green, or yellow light? how much fertilizer do flowering plants need? doese adding fertilizer cause flowering plants to grow taller? what is the best kind of soil to make plants grow taller?

Explanation:

The diagram shows plants under red, green, and yellow lights, with no visible differences in fertilizer or soil. The only variable tested is light color, so the question must relate to light color's effect on plant growth.

Answer:

Do flowering plants grow taller in red, green, or yellow light?