Decomposers are those organisms that help in decomposing dead bodies of plants and animals. In the absence of decomposers, soil, air, and water would not be replenished and all the nutrients present soon would get exhausted. Therefore, there would be no organic nutrients present in the soil. The ecosystem will be filled by plants and animal wastes all the dead plants and animals would destroy the habitat. Hence, the cyclic process of life and death would be disrupted and life would come to an end.