Step-by-step explanation:
If decomposers did not exist on Earth, organic matter such as dead plants and animals would not be broken down into nutrients that could be recycled back into the ecosystem. This would lead to a buildup of organic matter and a depletion of nutrients in the soil, which would ultimately result in a decline in the productivity of the ecosystem. Additionally, without decomposers, harmful pathogens and diseases could accumulate, which could have negative effects on the health of other organisms in the ecosystem. Overall, the absence of decomposers would disrupt the delicate balance of nutrient cycling and energy flow in ecosystems, and could lead to a collapse of the ecosystem.