(a) Define decomposers. Name one decomposer.(b) What is the role of decomposers in the ecosystem?

(a) Decomposers are the micro-organisms that break down the complex organic compounds present in dead organisms like dead plants and animals and their products like feces, urine, etc., into simpler substances.

Example – Bacteria and Fungi.

(b) The role of decomposers in the ecosystem is to help in decomposing the dead bodies of plants and animals and hence act as cleansing agents of the environment.