Final answer:
If the sun changed such that only green light reached the Earth, plants would be heavily affected.
Step-by-step explanation:
If the sun changed such that only green light reached the Earth, plants would most likely be heavily affected. Green light is the primary wavelength of light that plants use for photosynthesis, the process through which they convert light energy into chemical energy. Without other wavelengths of light, the plant's ability to carry out photosynthesis efficiently would be compromised, which would lead to stunted growth, weakened plants, and potentially even death.