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← GeographyWhich hillslope outcome develops, increasing glacial debris transport, when permafrost's active top layer experiences seasonal thaw?
A)Lobes advance via solifluction✓
B)Crevasses collapse producing icefalls
C)Sublimation accelerates ablation rates
D)Calving intensifies into icequakes
💡 Explanation
Solifluction causes lobe advance because the thawed active layer loses shear strength, deforming downslope due to gravity; therefore, debris lobes advance, rather than sublimation, as water saturation drives the mass wasting process.
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