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← GeographyWhich influence decreases sandstone arch strength due to enhanced weathering near its base?
A)Decreased thermal expansion coefficient
B)Increased groundwater capillary action✓
C)Elevated vegetation evapotranspiration
D)Reduced surface albedo reflection
💡 Explanation
An increase in sandstone pore water enhances salt weathering. Capillary action draws groundwater upwards, because dissolved salts precipitate during evaporation which intensifies physical disintegration; therefore strength decreases specifically at the base, rather than changes in reflective heating.
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