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← GeographyWhich consequence results when thawing permafrost destabilizes foundations?
A)Thermokarst reduces structural stability rapidly✓
B)Frost heaving reforms intact terrain
C)Talik formation improves water retention
D)Ice lens propagation prevents further damage
💡 Explanation
Increased thaw weakens permafrost, inducing thermokarst, because ground ice turns to water creating voids and subsidence; therefore structural instability dramatically decreases overall resistance, rather than ice lens reformation protecting foundations.
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