(A) Sudden Cooling and Contraction of the earth Surface
(B) Coming into activity of some dormant volcanoes
(C) Due to internal heat
(D) sometimes water changes into steam and expands
(A) Sudden Cooling and Contraction of the earth Surface
(B) Coming into activity of some dormant volcanoes
(C) Due to internal heat
(D) sometimes water changes into steam and expands
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