Assertion :Herbivores are also called as key industry animals because they convert plant matter into animal matter. Reason: Decomposers play a pivotal role in the ecosystem and they indirectly support the producers.

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 Elton $(1939)$ , herbivorous animals are key industry animals as they convert plant matter into animal matter and all other consumers(higher animals) lives are dependent upon these primary consumers.
Decomposers (also called as transformer) transform organic compounds into simple inorganic compounds. Saprophytic fungi and bacteria belong to this category. They act upon dead bodies of plants and animals and decompose them to their elemental and photosynthetic activity. In this way, decomposers indirectly support the producers and play a pivotal role in ecosystem.
So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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