Which of the following is a benefit of organic matter in soil?

Organic matter plays a crucial role in enhancing soil quality and fertility. One of its primary benefits is its ability to improve water retention and nutrient availability. When organic matter, such as decomposed plant material and animal waste, is incorporated into the soil, it creates a rich environment that retains moisture effectively. This is particularly beneficial in arid regions or during dry periods, as it helps ensure that plants have access to the water they need for growth.

Additionally, organic matter contributes to nutrient availability by acting as a reservoir for essential nutrients such as nitrogen, phosphorus, and potassium. The decomposition process releases these nutrients in forms that are more accessible to plants, thus promoting healthy growth and higher agricultural yields.

Other options present characteristics that do not accurately reflect the role of organic matter in soil. While organic matter can influence soil pH, it typically does not make soil more acidic; rather, it can help buffer pH levels and promote a more neutral environment conducive to plant growth. Likewise, organic matter is associated with increasing, rather than reducing, soil biodiversity, as it provides habitat and food sources for various soil organisms that contribute to a healthy ecosystem. Additionally, cation exchange capacity, which refers to the soil's ability to hold cations (positively charged ions),