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← GeographyWhich mechanism amplifies stream incision when tectonic uplift occurs in a humid region?
A)Increased sediment transport capacity✓
B)Decreased channel flow hydraulic radius
C)Reduced stream competence threshold
D)Enhanced chemical weathering of bedrock
💡 Explanation
When tectonic uplift occurs, the stream gradient increases, resulting in amplified sediment transport capacity because stream power is proportional to slope, enabling greater erosion. Increased transport capacity causing incision occurs, rather than the listed alternatives which inhibit sediment removal and require different conditions.
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