Far from "the only", I would say there are many developed countries in North and South America. In the north, all 3 countries are highly developed. In the south Brazil, Argentina, Chile and Venezuela are also well developed.
It is a more developed country. I'm assuming that you are referring to North America, and not South America. America Is what you would call a "first world" country, meaning its more civilized, and developed.
South of North America is South America.
South America
North America is a developed country :)
North America
The continent south of North America is South America.
North America
North America.
North America and South America
North America is south of the north pole.
North America is south of the north pole.