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← HistoryWhich outcome occurs when the Inca irrigation system's andenes terraces experience extreme rainfall followed by rapid freezing?
A)Increased crop yield variability✓
B)Enhanced soil nutrient retention
C)Reduced hydraulic head pressure
D)Diminished water infiltration rates
💡 Explanation
Crop yield variability increases due to freeze-thaw weathering, breaking terrace walls destabilizing the overall structure. Because differential soil expansion leads to erosion, therefore the land's support changes rather than simply changing hydraulic parameters; this leads to unreliable harvests.
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