<P> In Argentina, Buenos Aires is the principal metropolis with a population of around fifteen and a half million . The Greater Buenos Aires conurbation, which also includes several Buenos Aires Province districts, constitutes the third - largest conurbation in Latin America . Buenos Aires is the main political, financial, industrial, commercial, and cultural hub of Argentina . </P> <P> In Brazil, São Paulo is the principal metropolis with over 20 million inhabitants . In the larger cities, such as São Paulo and Rio de Janeiro (population 6.3 million), favelas (slums) grew up over decades as people migrated from rural areas in order to find work . The term used in Brazilian Portuguese for a metropolitan area is Região Metropolitana . Others metropolises in Brazil with more than one million inhabitants include: Belém, Belo Horizonte, Brasília, Campinas, Curitiba, Feira de Santana, Fortaleza, Goiânia, Manaus, Porto Alegre, Recife, and Salvador . </P> <P> The City of Toronto has a population of 3 million while The Greater Toronto Area is Canada's most urbanized region with a population of over 10 million people . Statistics Canada defines a census metropolitan area as one or more adjacent municipalities situated around a major urban core where the urban core has a population of at least 100,000 . Canada's largest metropoles are Toronto, Ontario, Montreal, Quebec and Vancouver, British Columbia . </P> <P> The primary metropolis in Chile is Santiago, with a population of 7 million in the metropolitan area . Santiago is the main political, financial, industrial, commercial, and cultural hub of Chile . </P>

Using complete sentences compare and contrast the characteristics of a metropolis and a megacity