Q.

Tsunamis are cuased by –

A. mixing of cold and warm currents
B. earthquakes
C. changes in sea level
D. volcanic eruption
Answer» B. earthquakes
Explanation: Most tsunamis are caused by earthquakes generated in a subduction zone, an area where an oceanic plate is being forced down into the mantle by plate tectonic forces. The friction between the subducting plate and the oveniding plate is enormous. This friction prevents a slow and steady rate of subduction and instead the two plates become "stuck".
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