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← HistoryWhich outcome arises when poorly constructed Andean terraces experience extreme rainfall?
A)Increased erosion and slope instability✓
B)Enhanced crop yield and soil fertility
C)Reduced water runoff and sedimentation
D)Improved water infiltration and drainage
💡 Explanation
Increased erosion results because hydraulic forces overwhelm terrace support via soil liquefaction; this reduces shear strength therefore triggering landslides, resulting in slope instability, rather than water management which stable terraces normally provide at reduced rainfall.
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