Natural Selection is often described as the "survival of the fittest". How does the change in moth color from light to dark and back to light demonstrate this concept?

The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. The frequency of dark-coloured moths increased at that time, an example of industrial melanism.

not sure if this what   you'r looking for would be percent composition

nucleus

would be most reasonable answer tbh