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Theory of Natural selection dwells on

1. role of environment in evolution
2. natural selection acting on favourable variations
3. changes in gene complex resulting in heritable variations
4. none of these

Correct answer: natural selection acting on favourable variations

Solution

Natural selection works by favoring individuals with beneficial variations, so those traits become more common over generations. The theory is not mainly about the environment alone or the origin of variations, but about selection acting on favorable ones.

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