Final answer:
Tsunamis are caused by underwater earthquakes or volcano eruptions, which displace water and result in the formation of massive waves. These waves can cause destructive impacts on coastal areas.
Step-by-step explanation:
Tsunamis are caused by underwater earthquakes or volcano eruptions. When these events occur, they can create a massive displacement of water, resulting in the formation of a tsunami.
For example, when an earthquake occurs beneath the ocean floor, the shift in tectonic plates causes the overlying water to be displaced, creating powerful waves that travel across the ocean.
These waves can gather strength as they approach the coastline, leading to devastating effects on coastal areas.
Learn more about Causes of tsunamis