Final answer:
Leaves absorb the least amount of light in the green range of the spectrum. Chlorophyll a and b absorb blue and red light efficiently, reflecting green light, which is why plants are green.
Step-by-step explanation:
Leaves absorb the least amount of light in the green range of the visible spectrum. The absorption spectrum for chlorophylls shows that they absorb light effectively in the red and blue regions, thus they reflect more green light rather than absorbing it.
This reflected green light is what gives leaves their characteristic green color. In particular, chlorophyll a and chlorophyll b, the two primary pigments in plants, have their absorption peaks in the blue and red areas of the spectrum and reflect green light, which is why plants usually appear green.
The leaves absorb the least amount of light in the green range of the visible spectrum. Chlorophylls, the main pigments responsible for capturing light energy during photosynthesis, absorb light most efficiently in the blue and red regions of the spectrum, while they reflect or transmit green light. This is why leaves appear green to us.
Therefore answer is 3) Green.