Final answer:
In arid cold environments, ice wedges can cause soil creep or solifluction, creating terraces on grassy slopes.
Step-by-step explanation:
In arid cold environments, some ice wedges can cause a phenomenon called soil creep or solifluction. When it is frosty, the moisture in the soil freezes, causing the ground to expand as ice expands outwards at right angles to the slope. When it thaws, the soil subsides vertically, creating terraces on grassy slopes.