Assertion :Sometimes one population adversely affects the other by direct attack but yet depends upon them. Reason: In a predation, the contact is instant.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
All living things within an ecosystem are interdependent. Any change in the population of one organism affects all other organisms within the ecosystem. Further, one population may adversely affect another by the direct attack like predator attacks prey.
Predation refers to the biological interaction in the ecosystem where the predator feeds on its prey. In the process, predators may or may not kill the prey prior to feeding, during predation the contact is instant on the prey population. Nevertheless, this is unavoidable as the predator population survives on the prey population for its food.
So, the correct answer is option A.

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