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← GeographyWhich process accelerates coastal erosion when rising sea temperatures thaw coastal permafrost?
A)Saltwater intrusion reducing sediment cohesion✓
B)Isostatic rebound creating steeper cliffs
C)Mechanical weathering from freeze-thaw cycles
D)Thermal expansion destabilizing bedrock
💡 Explanation
When rising sea temperatures thaw coastal permafrost, saltwater intrusion occurs because the thawed ground becomes more permeable, reducing sediment cohesion and increasing vulnerability to wave action. Therefore, saltwater intrusion reducing sediment cohesion accelerates erosion, rather than other options requiring different mechanisms.
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