Which of the following is NOT a factor that can lead to soil erosion?

• A. Water runoff
• B. Deforestation
• C. Increased soil biodiversity
• D. Agricultural practices

Answer: (C)

In the context of factors that lead to soil erosion, increased soil biodiversity is indeed the correct answer because it tends to contribute to soil health rather than degradation. High levels of biodiversity within the soil can enhance the stability of soil structure, improve nutrient cycling, and promote better water retention. These benefits lead to more resilient soils that are less prone to erosion.

On the other hand, water runoff, deforestation, and certain agricultural practices can significantly exacerbate erosion. Water runoff can transport soil particles away, leading to loss of topsoil. Deforestation removes trees that would otherwise anchor the soil, increasing vulnerability to erosion. Agricultural practices, particularly those that involve tilling or overgrazing, can disturb the soil’s structure and reduce its protective cover, making it more susceptible to being washed or blown away. Thus, increased soil biodiversity serves to combat erosion, highlighting why it is not a contributing factor.