Which agricultural challenge was directly mitigated by the Inca's stepped-terrace irrigation systems?

💡 Explanation

Inca terrace irrigation systems managed water flow; terraces interrupt slope length with level planting surfaces, slowing runoff, therefore reducing soil erosion and associated nutrient stripping. The terraces prevent nutrient depletion, rather than waterlogging, crop damage or slope inaccessibility, which rely on different design adaptations.

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