Question

Which of these is the source of the variation in wing color within the Peppered Moth population?

natural selection
pollution
genetic variation

Answer 1

Genetic variation

Step-by-step explanation:

It could lead to natural selection, but natural selection isn't the cause. Many years down the road you could see a particular variation having a higher population, which is the result of natural selection/survival of the fittest via better camouflaging from predators.