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← HistoryWhich consequence results when terrace walls fail during intense rainfall?
A)Reduced gradient erosion control
B)Impaired solar heat absorption
C)Increased lateral water infiltration
D)Accelerated topsoil nutrient leaching✓
💡 Explanation
A breach in terrace structural integrity undermines their intended function, triggering concentrated erosion. Surface runoff increases the rate of topsoil nutrient leaching because the decreased surface area can no longer retain the integrity of the soil, therefore loss of usable soil occurs rather than controlled drainage.
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