What does the term "organic matter" refer to?

The term "organic matter" refers to a substance containing carbon compounds, typically arising from the decomposition of plants and animals. This organic material plays a crucial role in soil health and fertility, as it enhances the soil structure, water retention, and provides essential nutrients for plants. Additionally, organic matter is integral to supporting beneficial microorganisms in the soil, which further contribute to a healthy ecosystem.

The mention of carbon compounds is key because, by definition, organic compounds are those that are primarily composed of carbon, along with hydrogen and possibly other elements. This distinguishes organic matter from purely synthetic substances or materials that lack carbon-based structures, which are described in the other choices.