What is food important of frogs

As tadpoles they feed on algae, which helps to keep the water clean. Once full-grown frogs feed on lots of insects, which helps to control bug populations. {from google}

Explanation:

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i think the answer is b.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.