Which process causes the smoothing and shaping of desert ventifacts?

💡 Explanation

Abrasion shapes ventifacts because wind transports sediment, acting as an abrasive agent to erode the rock surfaces. Therefore, abrasion is the mechanism, rather than dissolution, which requires water and specific chemical conditions; or crystallization/oxidation, which induce fracturing rather than smoothing.

• Which environmental change is indicated when desert ventifacts disappear?
• Which risk increases when mountain streams fed by glacial melt reach elevated temperatures?
• Which effect results when increased surface heating strengthens Hadley cell circulation?
• Which river morphology is prevented when levees fail?
• Which topographic outcome becomes pronounced after glacial retreat around cirques?
• Which geomorphic risk is most amplified when infrastructure development disrupts thermokarst processes within permafrost regions?