Which risk significantly increases for infrastructure built across slopes undergoing active solifluction?

💡 Explanation

For infrastructure on slopes with active solifluction, slow soil creep occurs because the ground thaws from the surface down, creating a saturated, mobile layer above a frozen base, leading to differential settling. Therefore, differential settling is the greatest risk, rather than chemical weathering, thermal stress, or overland flow which would be due to different factors.

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