Which group of organisms is responsible for breaking down dead organic matter?

The correct answer highlights the essential role of decomposers in the ecosystem. Decomposers, which include fungi, bacteria, and other microorganisms, break down dead organic matter, such as fallen leaves, dead plants, and animal remains. This process is crucial for nutrient cycling, as it transforms complex organic materials into simpler substances, enriching the soil and making nutrients available for producers, like plants, to use.

Without decomposers, ecosystems would become overwhelmed with dead material, and the recycling of nutrients necessary for sustaining life would be disrupted. By decomposing dead matter, these organisms help maintain ecosystem health and stability, enabling the overall food web to function effectively.