- They have long wavelengths and travel at a very high speed. ✔
Step-by-step explanation:
Tsunami waves are primarily characterized by their long wavelengths and high speeds. While they are indeed associated with strong underwater disturbances like earthquakes, volcanic eruptions, or landslides, it's the rapid displacement of a large volume of water that generates the long-wavelength waves, causing them to travel across the ocean at high speeds. The other options don't accurately capture the fundamental characteristics of tsunami waves.
