Assertion :Human regulated environment is also called noosphere. Reason: Man is the main cause for pollution in our ecosystem due to exploitation of natural resources.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
According to V. Vernadsky, the biosphere is the cradle of human society. The noosphere is a process of the conscious human transformation of the natural environment; it is not just a new state of biosphere but a scientific transformation of nature. The human is a part of the biosphere and is a product of evolution, but he is the main and the basic factor of the development of the noosphere.
The primary cause of human-induced extinction events is simply human overpopulation of planet earth. The most important causal anthropogenic activities are habitat destruction, overexploitation, pollution and the introduction of alien species to an environment.
Thus, the correct answer is option B.

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