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B
Predator food chain
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C
Both A and B
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D
Decomposer food chain
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E
Detritus food chain
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Solution
The correct option is C Decomposer food chain A food chain is series of plants/animals which are interrelated in the form of organism being eaten as food by the other. Dead animals eaten by blowfly which are further eaten by maggots which are eaten by frogs which are further eaten by snakes is an example of decomposer food chain. In the given chain, dead animals are decomposed by the blowfly. The blowfly is a decomposer which feed on dead material. They occupy the first trophic level. The blowfly are further eaten by maggots. They occupy the second trophic level. The maggots are eaten by frogs. They are carnivores and occupy third trophic level. The frogs are eaten by snakes. They are top carnivores and occupy fourth trophic level.
Thus, the correct answer is 'Decomposer food chain.'