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← GeographyWhich mechanism causes increased stream meandering observed when the subtropical jet stream shifts northward?
A)Increased precipitation and soil saturation✓
B)Decreased evapotranspiration and runoff
C)Reduced sediment transport capacity
D)Enhanced bank stabilization by vegetation
💡 Explanation
When the subtropical jet stream shifts northward, increased precipitation occurs because it transports more moisture, leading to soil saturation and higher stream discharge which increases bank erosion. Therefore meandering increases rather than decreases in response to evaporation, or changes in sediment load or stabilization.
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