Which risk increases when a large earthquake ruptures across a natural levee along a major river?

💡 Explanation

When an earthquake ruptures a levee, structural failure occurs because the seismic waves weaken the levee's integrity, leading to breaching and uncontrolled release of floodwaters. Therefore widespread flooding results, rather than altered sedimentation, dam failure, or salinity increases which each involve different triggering factors and locations.

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