Environmental

Missouri's karst topography in the Ozarks region creates a concern for:

AExcessive soil compaction
BSinkholes and rapid groundwater contamination through limestone dissolution✓ Correct
CVolcanic activity
DExcessive clay expansion

Explanation

Missouri's Ozark region features karst topography — limestone bedrock dissolved by water creating caves, springs, and sinkholes. This creates sinkhole risk for structures and makes groundwater contamination easy and rapid since pollutants can enter aquifers quickly.

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