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← HistoryWhich outcome weakens Inca terraces during El Niño events?
A)Increased soil water saturation✓
B)Decreased structural material cohesion
C)Accelerated thermal expansion rate
D)Reduced evapotranspiration threshold
💡 Explanation
Excessive rainfall causes increased soil water saturation within the terrace fill material, triggering MASS WASTING because it exceeds soil shear strength. Therefore, terrace infrastructure weakens, rather than exhibiting cohesion loss, due to direct hydrostatic pressure.
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