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← ScienceWhich mechanism explains ice lens formation under roads?
A)Cryosuction draws water towards freezing front✓
B)Osmosis concentrates salts at soil surface
C)Capillary action prevents localized ground freezing
D)Thermal expansion reduces granular soil porosity
💡 Explanation
Cryosuction explains ice lens formation because a temperature gradient generates suction pressure, drawing water vapor to a cold front in susceptible soils; therefore ice accumulates, rather than simply freezing randomly due to nucleation alone in the aggregate material.
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