What primary geomorphological hazard is most frequently accelerated by heavy seismic tremors and intense monsoon rainstorms on the steep hill slopes of Sikkim?

💡 Solution & Explanation

The steep topography, fractured rock structures of the Lesser Himalayas, heavy monsoon rainfall, and frequent seismic activity combine to make landslides and debris avalanches the dominant geomorphological hazard in Sikkim. Coastal sand dunes occur exclusively near marine shores, karst sinkholes form in extensive soluble limestone beds rather than complex metamorphic terranes, and alluvial fans are primarily depositional features rather than mass-wasting hazards. Mitigation efforts focus on bio-engineering and retaining walls along critical highway corridors.