Tsunamis are often generated by movements of the ocean floor.
Option C
Step-by-step explanation:
Tsunamis are huge gain ocean waves which are able to generate massive destruction, this huge damage can cause environmental distress. These waves are produced by earthquakes or underwater landslide. Mostly the tsunamis generated due to earthquake, induced movement by the ocean floor. These tsunami waves are generated more by the ocean floor which have greater length. They travel as fast as jet planes and within seconds can cover the whole area.