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← GeographyWhich consequence results when thawing collapses thermokarst lake shores?
A)Mobilization of dissolved organic carbon✓
B)Increased albedo and reflective cooling
C)Enhanced methane oxidation rates
D)Decreased nutrient availability in runoff
💡 Explanation
Thawing permafrost releases previously frozen organic matter; shoreline collapse accelerates *solifluction*, because rapid sediment input enriches dissolved organic carbon downstream, therefore increasing aquatic DOC rather than inhibiting oxidation or reflectivity.
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