The destruction power of a Tsunami is measured by its

The destructive power of a tsunami is usually measured by the height of its waves. A tsunami is generated by undersea earthquakes volcanic eruptions or landslides that displace massive amounts of water. When the waves reach shallow coastal areas their height increases dramatically which determines the level of damage. High waves can flood coastal towns destroy infrastructure and cause heavy loss of life. Scientists also monitor energy release and speed but wave height is the clearest indicator of destruction. Early warning systems focus on detecting seismic activity and predicting wave height to save lives. Hence option A is correct.