Answer :

Final answer:

Stable rock has the highest risk for cave-ins due to its solid nature, leading to sudden collapses.


Explanation:

Stable rock has the biggest risk for cave-ins due to its solidity, which can suddenly collapse. The other soil types, such as Type A, Type B, and Type C, are more prone to erosion and instability but are less likely to experience cave-ins as compared to stable rock.


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