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← GeographyWhich risk increases when ephemeral streams vanish underground?
A)Localized sinkhole collapse rates increase✓
B)River delta formation accelerates inland
C)Dissolved gypsum accelerates soil salinization
D)Artesian well yields sharply rebound
💡 Explanation
Sinkhole collapse rates increase due to concentrated flow; disappearing streams cause dissolution of soluble bedrock through the mechanism of chemical weathering, because water infiltration erodes the supporting structure. Therefore, surface stability is reduced rather than sedimentation or soil changes related to the presence of gypsum.
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