Answer:
often generated by movements of the ocean floor
Step-by-step explanation:
The tsunamis are the most devastating waves that occur on our planet. They are enormous and have great power, and once they reach the coastline they continue into the land and destroy pretty much everything on their way. These waves are mostly generated by movements, disturbances on the ocean floor. They occur at places where there's subduction zones. When an adjustment occurs between the crust of the plates, it creates an earthquake. That adjustment of the crust also creates gaps, through which the water is sucked in, and than as the crust continues with the adjusting and shuts the gap, the water is pushed back with lot of force. That creates the tsunamis, enormous, high speed, very powerful waves, that are devastating for everything on their way.