The organism known for its role in decomposing organic material is the fungus. Fungi, including mushrooms and mold, play a crucial ecological role as decomposers by breaking down dead plants, animals, and other organic matter. This process recycles nutrients back into the soil, making them available for plants and other organisms. Decomposing fungi return vital minerals to the ecosystem, promoting soil health and sustaining life. By converting complex organic substances into simpler compounds, they help maintain the balance of ecosystems and support biodiversity. Their role is essential for nutrient cycling in various habitats, from forests to grasslands.