Correct Answer: Earthquake

Solution : The correct answer is an Earthquake .

An earthquake is an unpredictable natural disaster which is caused by the shaking of tectonic plates. The hypocenter is the point beneath the Earth's surface where the earthquake begins, while the epicentre is the location directly above it on the Earth's surface. There are two scales used for measuring the intensity and magnitude of earthquakes- the Richter Scale, and the Mercalli Scale.