How does vegetation cover help in the prevention of soil erosion?

• A. By providing extra nutrients
• B. By stabilizing soil with root systems
• C. By increasing water runoff
• D. By increasing soil temperature

Answer: (B)

Vegetation cover prevents soil erosion mainly by stabilizing the soil with its root systems. The roots weave through the soil and bind soil particles together, building a tougher, more cohesive soil structure that resists being detached by raindrop impact or wind. This network holds soil in place and reduces the amount that can be swept or washed away. Additionally, the above-ground parts and leaf litter create a protective layer on the surface that slows down raindrops, lowers surface runoff velocity, and improves water infiltration, all of which lessen erosion. While nutrients and temperature aren’t the ways vegetation directly prevents erosion and increased runoff would worsen erosion, the strongest protection comes from the roots anchoring the soil and the canopy reducing surface impact.