What role does dense vegetation play in erosion?

• A. It reduces erosion by stabilizing soil and increasing infiltration
• B. It accelerates erosion by loosening soil
• C. It has no effect on erosion
• D. It increases erosion by adding weight

Answer: (A)

Dense vegetation reduces erosion by stabilizing soil and increasing infiltration. Roots hold soil particles together, forming a network that resists being carried away by wind or water. A plant cover also slows rainfall and the movement of surface water; the canopy breaks up raindrop impact and leaf litter improves soil structure, which helps water soak in rather than run off. With better infiltration, less surface flow means less soil loss and fewer erosion features like rills or gullies. In short, the combination of anchored soil, slowed runoff, and enhanced water intake makes erosion much less likely in vegetated areas. The idea that vegetation loosens soil, has no effect, or increases erosion by adding weight isn’t supported by how plant cover actually modifies surface processes—root binding and interception are the dominant factors reducing erosion.