Answer
Creep is a slow, gradual downslope movement of soil or regolith, typically occurring on gentle slopes. It is primarily driven by the expansion and contraction of soil particles due to freeze-thaw cycles or wet-dry cycles. In freeze-thaw cycles, water in the soil freezes and expands, pushing particles apart. During thawing, the soil contracts. These repetitive processes cause a net downslope movement of particles over time. In wet-dry cycles, the soil swells when wet and contracts when dry, leading to similar downslope movement. Creep can be recognized by observing tilted trees, fences, or utility poles, as well as visible curved or elongated features on the landscape.
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