Which environmental risk increased when pre-Columbian societies intensified terrace farming in the Andes?

💡 Explanation

When terrace farming intensified on steep Andean slopes, increased soil disturbance weakened the slope's structural integrity, promoting regressive landslides due to heavy rainfall which triggered downslope erosion. Therefore, increased soil erosion resulted, rather than flooding, depletion, or salinization which have other causes.

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