Which surface deformation pattern indicates active solifluction on moderate slopes in tundra regions?

💡 Explanation

When seasonally thawed active layer overlies permafrost, solifluction (soil flow) occurs because the saturated soil loses shear strength, resulting in the slow, downslope movement and formation of terracettes. Therefore terracettes indicate active solifluction, rather than eskers, drumlins, or kettle holes which are formed by glacial processes.

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