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← GeographyWhich risk increases when thawing permafrost destabilizes high-altitude mountain slopes covered with colluvium?
A)Increased frequency of debris flows✓
B)Reduced albedo from ice crystal growth
C)Decreased soil creep due to friction
D)Enhanced chemical weathering by lichens
💡 Explanation
When permafrost thaws, it loses its structural integrity because ice cement within the soil melts, reducing shear strength and mobilizing colluvium, leading to debris flows. Therefore debris flows increase, rather than albedo reduction, decreased creep, or enhanced weathering which relate to different processes.
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