Natural selection is the most likely reason that dark coloration became more common in peppered moths populations.
Option (A) Nature selected for the more fit dark-colored peppered moths in the new environment is the correct option.
The change in the heritable characters of a population over a generation.
Natural selection is a process in which a population adapts or changes itself for better survival.
Some examples are Galápagos finches, rat snakes, etc.
Thus, option (A) is correct.
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