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← GeographyWhich mechanism causes increased earthquake frequency following large reservoir construction?
A)Reduced tectonic plate boundary friction
B)Load-induced fault reactivation✓
C)Altered mantle convection currents
D)Weakened upper crustal rock density
💡 Explanation
When large reservoirs are constructed, load-induced fault reactivation can occur because the added water pressure increases stress on underlying faults, potentially exceeding their shear strength and triggering earthquakes. Therefore, fault reactivation results, rather than altered plate friction/mantle convection/crustal density which involve unrelated earth processes.
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