Choose the correct word to replace the given sentence. ( An event that causes great harm or dams)

Disaster

Pain

Problem

Relief

( An event that causes great harm or dams) Disaster
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Dams mean: A catastrophe is an unexpected event that causes great suffering or damage
Disaster means a sudden accident or a natural catastrophe that causes great damage or loss of life.
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so, according to the requirement of the question disaster is best to keep the meaning of the original sentence