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← GeographyWhich land deformation results when thawing permafrost causes widespread ground subsidence?
A)Thermokarst formation✓
B)Esker development
C)Drumlin elongation
D)Kame terrace stratification
💡 Explanation
When permafrost thaws, the melting ice weakens the ground because the ice acts as a binding agent, leading to subsidence and thermokarst formation. Therefore, thermokarst results, rather than eskers, drumlins, or kame terraces, requiring glacial deposition, not thaw subsidence.
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