Question

Why only food chain comprising 3 or 4 steps generally exist?
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Answer 1

Answer:

Most food chains are quite short, and they rarely consist of more than four steps. This is because a lot of energy is lost at each step. Food chain consists of few tropic levels only.. ... thus the energy reduces as it reaches the next level.. so there are only 3 to 4 tropic levels in a food chain..

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Answer 2

Answer:

because it is a group of all animal and human beings. simply we can say that who eat whom.

Explanation:

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