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← GeographyWhich outcome is directly caused by coastal upwelling events along continental margins?
A)Increased marine phytoplankton productivity✓
B)Decreased deep ocean oxygen concentration
C)Formation of submarine canyons
D)Intensified coastal erosion rates
💡 Explanation
When upwelling occurs, nutrient-rich deep water rises to the surface through wind-driven mechanisms, increasing nutrient availability that supports intense phytoplankton growth. Therefore increased productivity results, rather than deoxygenation, canyon formation or erosion which require different environmental conditions or mechanisms.
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