ELI5: Explain Like I'm 5

Waves and shallow water

Waves are like big bumps in the water that move up and down, and they happen when wind blows on the surface of the ocean or a lake. Waves come in all different sizes, from small ripples to huge ones that can be taller than a house.

When waves get to shallow water, like near the shore, they start to slow down because there's not as much water for them to move through. This can make them change shape and become taller and steeper, almost like a wall of water.

Sometimes these big waves can be dangerous for people who are swimming or boating because they can knock them over or pull them out into the deep water. So, it's important to be careful around waves in shallow water and to always listen to any warnings or advice from lifeguards or other experts.