Answer:
Correct option is (C)
Catastrophic ground cover collapse is a geological activity and it is not affected by the loss of at least 50% of the structure into the sinkhole.
Explanation:
Sinkholes are cavities in the ground that form when water erodes an underlying rock layer.
Sinkholes can be natural or man made.
Natural sinkholes occur due to erosion or underground water.
Humans are also responsible for the formation of sinkholes. Activities like drilling, mining, construction, broken water or drain pipes, improperly compacted soil after excavation work or even heavy traffic can result in small to large sinkholes.
