Which primary risk arose when the Inca implemented extensive agricultural terracing on steep Andean slopes?

💡 Explanation

When terraces were built on steep slopes, heavy rainfall caused concentrated runoff if drainage systems failed, which resulted in significant soil erosion because the increased water volume and speed overwhelm the terrace retaining walls. Therefore heightened erosion risk occurred instead of nutrient depletion, biodiversity loss, or pest infestation, which necessitate different agricultural practices.

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