Which ocean borders the West Coast of the United States?

The Pacific Ocean is the correct answer because it is the largest ocean in the world and directly borders the West Coast of the United States. This coastline includes several states such as California, Oregon, and Washington, which all have shorelines that meet the Pacific Ocean. The Pacific Ocean plays a significant role in the climate, economy, and culture of the West Coast, offering access to maritime trade and recreational activities, and has a profound impact on the ecosystems and lifestyles of the people living there.

In contrast, the Atlantic Ocean borders the East Coast of the United States, while the Arctic Ocean is located to the north and does not have a direct influence on the contiguous U.S. The Indian Ocean, located primarily between Africa, Asia, Australia, and the Indian subcontinent, is also not relevant geographically to the U.S. coastline. Thus, the Pacific Ocean stands out as the body of water directly associated with the states along the West Coast.