Canada. Or Denmark (if you include the territory of Greenland).
The northernmost country in North America is geographically Denmark (via Greenland, a Danish territory).
Antarctica
Africa
Great Britain
North America is the continent farthest north. Greenland, an autonomous territory of Denmark in the North Atlantic Ocean, contains the northernmost point on the continent.
The northernmost continent is North America. It is located in the Northern Hemisphere and extends to the Arctic region.
Spain, Britain, and the U.S. were the main ones
They didn't. During the seven years war (French and Indian War) they took over French territory in North America. They did recognize that territory south of Georgia and west of the Mississippi River was Spanish owned
The continent south of North America is South America.
The northernmost part of Scandinavia is at a latitude similar to northern Alaska in North America. The southernmost part of Scandinavia is at a latitude similar to northern Maine in North America.
Arctic