Non-microbial bio control agents that naturally control the insect pests of crops are

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Ladybird and Mosquitoes

Dragon flies and Aphids

Beetle with red and black markings and Dragonflies.

Mosquitoes and Aphids

answer is C.

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Detailed Solution

Ladybird (a beetle with red and black markings) and Dragonflies are natural biocontrol agents that contain the insect pests of crops such as Aphids and Mosquitoes respectively.

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