Question

What organisms break down the remains of dead plants and animals into simpler substances?

Answer 1

Decomposers

Explanation:

Decomposers are small organisms that break down the remains of other dead organisms into simpler substances, which actually enrich the soil, and make it so that new plants that grow there will have enough nutrients to live.

Some decomposers include fungi, worms, and insects. All ecosystems should have at least one decomposer.