Convolution.

What is coevolution?

Convolution is a relationship between organisms whose interactions have changed them to adapt to each other. These changes are often very long-term and have taken a long time to appear, however when the shoe fits it's called coevolution.

An example of this process can be found in Africa. Have you ever noticed that the cheetah and the lion both have a coat similar to that of the grass? It's obviously camouflage, but why would they want a coat that looks like grass? It's simple, to catch and hunt their prey without being spotted.