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Decomposers are organisms that

1. elaborate chemical substances, causing death of tissues
2. operate in living body and simplifying organic substances of cells step by step
3. attack and kill plants as well as animals
4. operate in relay terms, simplifying step by step the organic constituents of dead body

Correct answer: operate in relay terms, simplifying step by step the organic constituents of dead body

Solution

Decomposers break down the organic matter of dead organisms into simpler substances, recycling nutrients back into the ecosystem. Option D correctly describes their role.

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