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← HistoryWhich consequence arises when terrace irrigation systems in the Andes face prolonged drought?
A)Increased topsoil erosion downslope rapidly✓
B)Enhanced nitrogen fixation by soil bacteria
C)Decreased albedo effect with heat absorption
D)Accelerated weathering of terrace stones
💡 Explanation
Increased soil saturation leads to slope instability because the Hydrostatic pressure increases, triggering rapid downslope displacement of the now saturated soil, therefore topsoil erodes at faster rate, rather than terraces remaining stable.
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