Wind erosion is one of the key causes of desertification and occurs when soil is left bare of vegetation. State the major cause of wind erosion in arid and semi-arid lands where this problem is most severe

Wind erosion occurs when vegetation cover is removed, exposing soil to wind. In arid and semi-arid regions, overgrazing by livestock is the primary cause as it destroys the protective vegetation layer, allowing wind to pick up and transport soil particles. While deforestation and land clearing also contribute, overgrazing is most severe in these fragile ecosystems.