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| Q. |
Earthquake is caused by – |
| A. | disturbance of earth surface |
| B. | adjustment of layers of earth's crust |
| C. | breakage of rock system |
| D. | upliftment of rocks |
| Answer» A. disturbance of earth surface | |
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Explanation: Most earthquakes are minor tremors. Larger earthquakes usually begin with slight tremors but rapidly take the form of one or more violent shocks, and end in vibrations of gradually diminishing force called aftershocks. The subterranean point of origin of an earthquake is called its focus; the point on the surface directly above the focus is the epicenter. |
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