Limestone pillars are beautiful rock formation is the statement about limestone caves is an opinion. Thus, option (4) is correct.
What is limestone?
The term "limestone" was the sedimentary rock composed of tiny fossils. Limestone is a source of lime are the used in the mining, water treatment, plastic production and also used in the agriculture activity. The created on it yields lime when burnt.
Limestone is a type of carbonate sedimentary rock. It was the involved on the calcium carbonate (calcite) and the magnesium (dolomite). Limestone is extremely durable. It was the marine sediment deposited on sea floors are the pillars on the beautiful rock formation.
As a result, the Limestone pillars are a beautiful rock formation. Therefore, option (4) is correct.
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