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← GeographyWhich disruptive effect arises from upwelling's sudden reduction?
A)Altered oceanic carbon sequestration✓
B)Intensified coastal erosion rates
C)Widespread volcanic activity spikes
D)Reversal of the Earth’s magnetic field
💡 Explanation
Reduced upwelling limits nutrient supply, which reduces phytoplankton, therefore less carbon dioxide is absorbed from the atmosphere because the biological pump weakens. It is oceanic sequestration rather than coastal erosion driven by waves.
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