Which risk increases on gentle slopes underlain by permafrost undergoing active solifluction?

💡 Explanation

When permafrost thaws, solifluction occurs because the active layer becomes saturated and flows downslope due to gravity, leading to ground surface deformation. Therefore, foundation instability results, rather than seismic activity, chemical weathering or river erosion changes that require tectonics, geochemical reactions or fluvial dynamics.

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