Concept:Adaptive colouration helps animals blend with their environment to avoid being seen.Explanation:Hibernation and aestivation are states of dormancy, not colouration.Migration is movement from one place to another.Countershading is a form of camouflage.In countershading, the animal's upper surface is darker than its lower surface.This reduces shadows, making the animal less noticeable to predators or prey.Answer:C. countershading