Which of the following is an example of erosion control?

• A. Concrete barriers
• B. Mechanical grinders
• C. Protective blankets, wildflowers, and straw
• D. Asphalt paving

Answer: (C)

Erosion control means protecting the soil surface so it doesn’t get detached and washed away by rainfall or runoff. Protective blankets, along with straw mulch and quick-growing vegetation like wildflowers, provide immediate soil cover and a root system that holds the soil in place. The blankets protect the surface from impact, the straw reduces the energy of raindrops and slows runoff, and the wildflowers establish roots that stabilize the soil over time. Together they actively prevent soil loss, which is the core idea of erosion control. Concrete barriers, grinders, or asphalt don’t directly stabilize the exposed soil surface in the same way, so they’re not examples of erosion control.