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← HistoryWhich risk increased when the Han Dynasty intensely cultivated marginal loess terraces?
A)Increased incidents of catastrophic sediment failures✓
B)Reduced nitrogen availability in lower terraces
C)Impaired water filtration through loess layers
D)Accelerated nutrient depletion by annual flooding
💡 Explanation
Sediment terraces failed because excessive cultivation weakened inherent Cohesion; landslides occurred rather than gradual weathering. Therefore, this created catastrophic failures because cohesion decreased, impacting downstream areas.
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