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<em>Your best answer choice is </em><em>B. Grams.</em>
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Answer:
The population of light colour Peppered moths decreases and dark Peppered moths increases.
Explanation:
During the industrial revolution, the population of light colour Peppered moths decreases and dark Peppered moths increases because due to industrial revolution, air pollution increases which spreads a black dust on the trees and as a result the light colour Peppered moths can easily be seen in the dark by its predator and feed on them while dark colour Peppered moths can't be seen in the dark so the predator is unable to feed and as a result the population of dark colour Peppered moths increases.
Your answer is A. gene flow
Five conditions are required which are 1)there must be random mating,2)the population must be very large,3)there cannot be no movement into our out of the population, 4)no mutations,5)no natural selection.