system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: Why do waves break left to right/right to left instead of breaking all at once?
gpt
How the waves hit land depends on the direction of the wind that made the waves, and they break when they hit a certain surface level of the sea bottom. If you have ever dived you will know that the surface bottom us uneven. Ironically because of waves.

Wind can come from all directions. Which is 360 degres all around. For the waves to break evenly they have to hit a total evenly rising ocean bottom at a direct 90 degree angle.

Statistically that never happens.

Build a concrete ocean floor that rises relatively sharply in a 90 degree angle to the prevailing winds and it will happen from time to time :-)