Which primary risk affects the structural integrity of traditional Inca terraced farms during intense rainfall?

💡 Explanation

During intense rainfall, hydrostatic pressure behind terrace walls significantly increases because water accumulates within the terrace fill, increasing the lateral force on the retaining structure and potentially leading to collapse. Therefore increased hydrostatic pressure is the risk, rather than reduced sunlight, nutrient depletion, or oxygen deprivation, which occur independently.

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