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← HistoryWhich outcome results when terrace construction exceeds slope stability limits in ancient Andean cultivation?
A)Declining crop nutrient cycling
B)Accelerated hillside soil liquefaction
C)Increased downstream sediment deposition✓
D)Widespread oxygen deprivation amongst plants
💡 Explanation
When steep terraces lack sufficient drainage or reinforcement, increased water saturation amplifies soil creep, causing landslides through the mechanism of soil mass wasting. This leads to sediment deposition, which smothers lower fields, therefore destroying crops, rather than nutrient loss or liquefaction at a distance.
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