Question

the absorption spectrum reveals which wavelengths of light and colors are most effective in driving photosynthesis. based on the graph presented: which light color is the least effective in driving photosynthesis? blue light. violet light red light. green light.

Explanation:

The absorption spectrum shows how much light of different wavelengths is absorbed by chlorophylls. Chlorophylls (a and b) absorb very little green light. Since the question is about which light is least effective in driving photosynthesis (and light absorption is key for photosynthesis - less absorption means less effective), we look for the color with the lowest absorption. Green light has low absorption by chlorophylls as seen in the graph (low light - absorbed percentage in the green - wavelength range).

Answer:

Green light.