What is the name of the large body of water located to the east of North America?

Analysis:

The map shows North America in the center. To its east, there is a large body of water labeled.

The label to the east of the northeastern United States and Canada is 'АТЛАНТИЧЕСКИЙ ОКЕАН' (Atlantic Ocean), though this label is not fully visible or clear in the provided image.

However, a more prominent and clear label is 'САРГАССОВО МОРЕ' located to the east of the southeastern United States and extending towards the Bermuda region.

Considering the question asks for 'the large body of water', and 'Sargasso Sea' is a distinct, named region within the Atlantic Ocean, it is a valid answer for a specific area east of North America.

If the question implies the larger ocean basin, it would be the Atlantic Ocean.

Let's examine the visible labels carefully. To the east of the United States, a large sea is labeled 'САРГАССОВО МОРЕ'. Further north and east, though less clear, is likely the Atlantic Ocean.

Given the clarity of the label 'САРГАССОВО МОРЕ' on the eastern side of the North American continent, this is the most directly identifiable large body of water shown.

Answer: Sargasso Sea