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Industrial melanism is an example of

1. defensive adaptation of skin against ultraviolet radiations
2. drug resistance
3. darkening of skin due to smoke from industries
4. protective resemblance with the surroundings

Correct answer: protective resemblance with the surroundings

Solution

Industrial melanism is a classic case of natural selection where darker forms are favored because they blend better with the polluted environment. This is protective resemblance with the surroundings, helping organisms avoid predators.

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