The correct answer is: A) blue
Plants, as photosynthetic organisms have the ability to convert Sunlight energy into chemical energy. They do that thanks to light-absorbing molecules - pigments that absorb only specific wavelengths of visible light. The set of wavelengths that a pigment does not absorb are reflected, and that reflected light is what we see as color.
Because of that, plants appear green to us: pigments chlorophyll a and b within plants reflect green light.
