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How does a sinkhole form?

A. Carbonic acid eats away at an underground limestone formation and eventually creates a depression when the ground surface collapses.
B. Sulfuric acid eats away at an underground limestone formation and eventually creates a depression when the ground surface collapses.
C. Groundwater under pressure pushes upward on a layer of soil at the surface, eroding it from beneath until it collapses.
D. Groundwater heated to boiling temperatures by geothermal energy forms bubbles of steam that push up on surface rock until it collapses.



Answer :

GinnyAnswer

Final answer:

Sinkholes are created through erosion by groundwater, causing collapses in underground caverns, resulting in depressions on the surface known as sinkholes.


Explanation:

Sinkholes are geological formations that occur when erosion by groundwater causes the collapse of a cave's ceiling, leading to the sinking of rock and soil, creating depressions on the surface. Sinkholes can be formed either from beneath the surface due to the dissolution of limestone, or from the surface down, where water infiltrates and widens fissures. Fast subsidence, induced by acidic water dissolving limestone, can also lead to the formation of sinkholes.


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