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Which destabilizing outcome accelerated erosion after Inca abandonment of their terracing systems?

A)Oxidation of the hydraulic cement
B)Fracture from freeze-thaw cycles
C)Increase in soil pore pressure
D)Decomposition of the mortar binder

💡 Explanation

Mass wasting increased because the removal of root systems decreased soil cohesion, creating increased pore PRESSURE, a contributing cause of slope instability and landslides. Therefore, excess water permeated the soil rather than being taken up by plants.

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