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← HistoryWhich risk increased as Incan terrace walls exceeded critical heights during intensive maize cultivation?
A)Reduced soil fertility from nutrient leaching
B)Terrace collapse from hydrostatic pressure✓
C)Increased pest infestation from poor drainage
D)Decreased crop yield from wind exposure
💡 Explanation
As terrace walls increased in height, hydrostatic pressure increased due to water accumulation behind the walls after rainfall as soil pores became saturated, exceeding the failure tolerance of the walls and structure. Therefore terrace collapse becomes more likely rather than nutrient leaching, pest issues, or lower yields, each driven by alternative environmental mechanisms.
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