A) reproductive isolation
B) induced mutation
C) natural selection
D) geographical isolation
Correct Answer: C
Solution :
Industrial melanism refers to the occurrence, of dark (melanic) forms (of insects) in regions with high industrial pollution?where surfaces on which the insects rest are darkened by soot and where atmospheric \[S{{O}_{2}}\] level are high enough to prevent the growth of lichens. The mutant dark forms of insects would not be easily seen and avoid being preyed; thus the population of dark forms of insects would increase-natural selection being in their favour as compared to lighter forms which would be easily sighted and eaten.
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