What ocean is located on the west coast of the United States?

The Pacific Ocean is the largest and deepest ocean in the world and is located on the west coast of the United States. Stretching from the Arctic in the north down to the Southern Ocean in the south, it borders notable states such as California, Oregon, and Washington. The Pacific Ocean plays a significant role in the climate, economy, and ecosystems of the western United States, making it a crucial geographical feature.

On the other hand, the Caribbean Sea, while a significant body of water located to the southeast of the United States, is not on the west coast. The Atlantic Ocean lies to the east of the United States, making it the wrong choice when considering the west coast. The Southern Ocean, located around Antarctica, is also not relevant to the west coast of the United States. Thus, the Pacific Ocean is clearly the correct answer as it is the body of water directly adjacent to the west coast region.