Explain from the point of view of Darwin’s theory of the appearance of the green color of the caterpillar body

Darwin was committed to the idea that only an unadapted organism would not survive in the environment. And the main condition for staying in this world, Darwin considered variability. In the case of a caterpillar, the green color contributes to its disguise, it is simply lost in the green foliage of the plants. Predators can clearly see objects that differ in color from each other, but in this case they are powerless. Caterpillars are a delicacy for birds, amphibians or other animals, even for humans, because they consist of a large amount of nutrients and protein.