What ocean is on the East Coast of the United States?

Why this is the answer

The Atlantic Ocean is on the East Coast. It is the second largest ocean, covering about a fifth of the Earth's surface, and it was named after Atlas, the giant of Greek mythology. It formed when the North American and European continents separated millions of years ago, and running down its middle is the Mid-Atlantic Ridge, an underwater mountain range that stretches its whole length and is a source of volcanic activity. It is one of the most heavily traveled sea routes in the world. Fourteen states border it, from Maine down to Florida. Memory hook: Atlantic on the east, where ships from Europe arrived; Pacific on the west.