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← HistoryWhich consequence arises when terrace farming soil experiences prolonged, intense rainfall?
A)Decreased crop yield from root rot
B)Fertilizer runoff causing eutrophication
C)Terrace collapse from hydrostatic pressure✓
D)Increased pest infestation from dampness
💡 Explanation
When terrace soils are saturated from rain, hydrostatic pressure increases within the soil because infiltrated water adds weight and reduces soil shear strength, leading to structural failure and potential collapse. Therefore terrace collapse results, rather than crop yield decrease, eutrophication, or pest increase needing different environmental conditions.
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