Concept:Farming practices that remove or destroy soil cover increase erosion, while practices that keep the soil covered reduce it.
Explanation:Bush burning destroys vegetation and organic matter, leaving the soil bare and prone to erosion.
Land clearing removes the protective plant cover, directly exposing the soil to wind and water.
Overgrazing strips the grass cover and compacts the soil, making erosion more likely.
Crop rotation, however, maintains soil cover throughout the year and improves soil structure, thereby reducing erosion.
Answer:C. crop rotation