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← GeographyWhich risk increases when a large oceanic gyre shifts its established position due to changed wind patterns?
A)Increased coastal erosion rates downstream✓
B)More intense deep ocean volcanic activity
C)Weakened global thermohaline circulation
D)Decreased frequency of major earthquakes
💡 Explanation
When gyres shift, redistribution of energy changes sediment deposition rates because altered wave action exposes previously protected coastlines, increasing erosion. Therefore, increased coastal erosion results, caused by changed energy distribution, rather than changes to the ocean's overall thermohaline circulation, the deep ocean's volcanic activity, or earthquake frequency which are unrelated.
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