What kind of question
There are only two landlocked countries in South America, Paraguay and Bolivia.
Latin America typically consists of South America, Central America, and the Caribbean. These regions share a common history of colonization by European countries, predominantly Spain and Portugal, and have a shared identity rooted in a mix of indigenous, African, and European cultures.
Falkland Islands, Galapagos Islands and French Guiana are the 3 countries located in South America. The highest waterfall is in South America.
Brazil, ColOmbia, Peru
Russia, China, and Serbia. these are not from south America
Brazil, Chile, Colombia.
Ecuador, Colombia, Brazil
USA, Canada, Brazil, Argentina, Mexico
Brazil, Columbia and Equador
Ecuador, Colombia and Brazil.
Brazil,Columbia,Ecuador
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.