Which geomorphic feature develops when melting permafrost destabilizes slopes in arctic tundra?

💡 Explanation

When permafrost melts, the ground subsides unevenly due to thawing ice creating thermokarst because the frozen ground loses its structural integrity, leading to surface depressions that fill with water. Therefore thermokarst lake expansion results, rather than eskers kettle holes, ,or drumlins which arise from glacial deposition mechanisms.

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