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← HistoryWith Inca terracing weakened by seasonal freeze-thaw cycles, which accelerating outcome results from decreased soil cohesion?
A)Increased surface runoff rates✓
B)Enhanced nitrogen fixation levels
C)Reduced subsurface water infiltration
D)Improved thermal insulation properties
💡 Explanation
Increased runoff results from reduced cohesion. Because the terracing's interlocking root matrix degrades, the soil undergoes subsidence, increasing water flow across the saturated loose surfaces and overland flow of sediment laden water, therefore increasing hillside erosion, rather than water infiltration.
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