Discussion
Tsunamis are produced by
Answer: C
Tsunamis are produced by sub-marine earthquakes. A sudden movement of the sea floor at a fault displaces a great volume of water, and the waves travel across the ocean at high speed, rising when they reach shallow water. Tides are due to the pull of the moon and sun, cyclones make storm surges, which are a different kind of wave, and the shrinking of the earth's crust is a theory of mountain building. Option C is correct.
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