Most of South America was colonized by Spain & Portugal. An area controlled by the British, French, and Dutch was called the . Guianas

Andes

Amazon

Pampas

One drawback of voluntary trade is that it a. requires two groups to use a common language b. can make one group dependent upon another for necessary goods c. doesn't occur unless there is a shortage of goods for at least one group d. forces groups to rely on themselves to produce all the goods they need