Question

7. What is a Tsunami?
the alternate rise and fall in
the level of seawater
mass of ocean water
moving in a particular
direction
a very long wave caused by
a submarine or coastal
earthquake
the amount of water vapour
present in the atmosphere​

Answer 1

Answer:

A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions. ... But as the waves travel inland, they build up to higher and higher heights as the depth of the ocean decreases. The speed of tsunamiwaves depends on ocean depth rather than the distance from the source of the wave

Answer 2

Answer:

a submarine or coastal cause by earthequake