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Which geological feature can pose a significant risk during tunnel construction?

A. Glacial erratics

B. Landslide scars

C. Active faults

D. Soil horizons

Answer: Option C

Solution (By Examveda Team)

Active faults are fractures in the Earth's crust along which movement has occurred recently.Tunneling near active faults is risky due to potential ground movement.Correct Answer: Active faults.

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