Organic matter refers to the remains of plants and animals, as well as substances produced by living organisms. It includes materials like leaves, roots, and animal waste, which decompose over time. This decomposition process enriches the soil, making it more fertile and capable of supporting plant growth. In ecosystems, organic matter plays a crucial role in nutrient cycling. It provides essential nutrients to plants, which in turn support herbivores and carnivores. Additionally, organic matter helps improve soil structure, allowing for better water retention and aeration, which benefits all forms of life in the environment.