Why are food chains generally made of only 3-4 trophic levels?

Question

Why are food chains generally made of only 3-4 trophic levels? — Exam MCQ

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C. Energy availability to next trophic level is very low — Only a small fraction of energy is transferred to the next trophic level, limiting the number of trophic levels.

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A. Producer population is low

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B. Top carnivores cannot be eaten by any organism

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D. Decomposers terminate the food chain

Why are food chains generally made of only 3-4 trophic levels?

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