All of the above
Explanation
Anthropogenic activities, particularly the expansion of agriculture and infrastructure development, significantly alter land surface characteristics. These changes disrupt natural soil stability and vegetation cover, leading to various forms of land degradation.- Landslides: Construction activities (such as road building and urbanization) and agricultural expansion on hill slopes often involve cutting into slopes and removing stabilizing vegetation. This destabilizes the soil structure and increases the susceptibility to mass movements like landslides.
- Soil Erosion: Both agriculture (ploughing, deforestation) and construction remove the protective top layer of vegetation. This exposes the soil to agents of denudation like wind and water, accelerating the rate of soil removal.
- Desertification: Intensive agriculture (leading to nutrient depletion and salinization) and urban expansion contribute to the degradation of land in arid, semi-arid, and dry sub-humid areas. This process, driven by human activities and climatic variations, results in desertification.
Key Takeaway: Unregulated expansion of agriculture and construction acts as a catalyst for land degradation, simultaneously triggering soil erosion, slope instability (landslides), and long-term loss of biological productivity (desertification).