Question

what is Tsunami when and how it happens?

Answer 1

Tsunami are actually waves caused by sudden movement of the ocean due to earthquakes, landslides on the sea floor, land slumping into the ocean, major volcanic eruptions or large meteorite impacts. ... the top of an underwater volcano may collapse downwards, so that the overlying water also drops.

Answer 2

HEYYA FRND.
________

TSUNAMI..

ITS A WAVE that happens when SUDENLY movement of the ocean

by the earthquake And the sliding the land in the flore of sea.

and the one another reason for this

Under the water the top of the volcano can fall down, so that the upper water also falls.

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THANK YOU
@SRK6