They had complex societies.
There are three... The Andes - South America The Rockies - North America The Remarkables - New Zealand (South Island)
Yes
South of North America is South America.
South America
North America
He convinced Europeans he had discovered a North and South America.
Yes and no. If you mean "America" the continent, then it's true - and you also have South America. If you mean The United States of America, then, no because North America is the whole continent.
The continent south of North America is South America.
complex societies
North America
North America.
North America and South America