Which material may be used to stabilize soil in erosion-prone areas?

The correct answer is geotextiles because they are specifically designed to stabilize soil in erosion-prone areas. Geotextiles are permeable fabrics that function in soil stabilization, erosion control, and drainage applications. When placed in contact with soil, they help to separate, filter, reinforce, protect, or drain the soil. Their ability to allow water to pass through while providing structure and support helps to prevent erosion and promotes vegetation growth, which further aids in soil stabilization.

In contrast, concrete barriers are typically used to control water flow and protect specific areas rather than directly stabilizing soil. Plastic sheeting can help in managing moisture and preventing erosion in some contexts, but it does not provide the same structural support or benefits as geotextiles. Wooden stakes may assist in securing other erosion control measures like silt fences or erosion control blankets, but they do not have the direct soil stabilization capabilities that geotextiles possess. Thus, geotextiles stand out as the most effective material for actively promoting soil stabilization in erosion-prone areas.