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In a pond ecosystem, the primary consumers are tadpole larvae of frogs, fishes and other aquatic animals which consume green plants and algae as their food. These herbivorous aquatic animals are the food of secondary consumers. Frogs, big fishes, water snakes, crabs are secondary consumers.

In a pond ecosystem, the frog serves as a consumer. The correct option is D.

What is a consumer?

Consumers are lifeforms that require food to produce energy. These organisms are known as heterotrophs, which means they must consume something else as food.

In a pond ecosystem, tadpole larvae of frogs, fishes, and other underwater animal life that eat green plants and algae are the primary consumers.

Thus, the correct option is D.

For more details regarding consumers, visit:

https://brainly.com/question/13420317

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