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प्रश्न
Give an example of a four-step food chain operating in a large lake.
लघु उत्तरीय
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उत्तर
A four-step food chain in a large lake is: Phytoplankton (producer) → Zooplankton (primary consumer) → Small fish (secondary consumer) → Big fish (tertiary consumer). Here, energy flows from producers to herbivores to carnivores through each trophic level in the aquatic ecosystem.
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