Which ocean borders the East Coast of the United States?

The Atlantic Ocean is the body of water that borders the East Coast of the United States. This ocean plays a significant role in the climate, trade, and travel in the region. The coastline along the Atlantic is home to many major cities, including New York City, Boston, and Miami, and it serves as a vital route for shipping and transportation.

The other oceans mentioned are located in different parts of the world and do not touch the East Coast of the U.S. The Pacific Ocean borders the West Coast, the Indian Ocean is primarily located to the south of Asia and Africa, and the Arctic Ocean is found to the north of North America. Therefore, the Atlantic Ocean is the only correct choice for this question.