Why are most people in Latin America in the Brazilian Plateau?

Although the Amazon plain is rich in resources, its environment is harsh, wet and rainy, and it is not suitable for human habitation.

Brazilians live in the Brazilian plateau because of its good climate and rich products. Brazil is an immigrant country for Europeans, and Europe can find weather similar to their country from the plateau. For example, portoalegre in the south is a famous German settlement. Sao Paulo and Rio, Brazil's largest states, are places where plains and plateaus meet. It does not completely belong to the plain or plateau. Brasilia is located in the center of the Brazilian plate. In order to promote the economic and political development of the country and the poor public security in Rio, the capital was moved here from the original Rio.