Question

Under what color of light will plants be least likely to make food

Answer 1

This is important question because plants absorb in some light at very  specific wavelengths to obtain energy and light. Chlorophyll absorbs blue and red lights while green lights are being transmitted or reflected. These are the reasons why plants appear to be green on us.
:) :) :)

Answer 2

I believe the answer is green light because plants themselves are green. They'll probably reflect the green light instead of absorbing it making them least likely to grow food.

Sorry if I'm wrong but I hope this helps.