Define a tsunami.

A tsunami is defined as a series of ocean waves produced by underwater disturbances, such as earthquakes, volcanic eruptions, or landslides. When these disturbances occur, they displace a large volume of water, generating powerful waves that can travel across oceans at high speeds. Unlike regular ocean waves caused by wind, tsunamis can have a much longer wavelength and can cause significant destruction when they reach coastal areas.

Understanding this definition clarifies why the other options are not suitable. For instance, wind-generated waves are typically smaller and less powerful than tsunamis and arise under entirely different conditions. The concept of a tidal wave refers specifically to changes in sea level caused by gravitational forces, which is unrelated to the disturbances that generate tsunamis. Lastly, waves created by atmospheric pressure changes do not result in the same phenomena as those caused by underwater events. This distinction between the various types of ocean waves highlights the unique nature and characteristics of tsunamis.