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← GeographyWhich risk predominates slope failure in mountainous regions with thawing permafrost?
A)Creep acceleration by sediment liquefaction✓
B)Vegetation loss from increased erosion
C)Rockfall frequency due to water pressure
D)Glacier advance from ice destabilization
💡 Explanation
When permafrost thaws, the ice that cements soil and rock together melts, causing sediment liquefaction, because water saturation reduces intergranular friction, accelerating creep processes. Therefore, creep dominates; alternatives need different changes: reduced vegetative cover causing more surface erosion, water accumulation increasing rockfall and ice base destabilization causing glacier advance.
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