What are the main features of a tsunmi?

Answer 1

Tsunamis have large waves that come over land and cause flooding. Plate tectonics cause this.

Answer 2

Tsunamis are long, high sea waves usually caused by underwater earthquakes, volcanic eruptions, or landslides. They can travel at high speeds across the ocean and cause widespread destruction when they reach land. Tsunamis have long wavelengths and low wave heights in deep water, but their energy allows them to grow larger as they approach the shore.