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← GeographyWhich risk increases when bentonite clay along faults hydrates?
A)Reduced fault shear stress
B)Enhanced seismic wave velocity
C)Increased landslide susceptibility✓
D)Decreased groundwater contamination diffusion
💡 Explanation
Increased landslide susceptibility results because fault hydration reduces soil cohesion via pore pressure increase, a process called effective stress reduction; therefore, slope destabilization increases rather than fault stress decreasing or seismic velocity increasing under such conditions.
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