The Brazilian flag features green, yellow, blue, and white colors representing forests, wealth, sky, and peace. The stars represent Brazil's 26 states and federal district. Brazil is a federative republic with a presidential system; the president is both head of state and head of government. Rio de Janeiro was originally the capital but it was moved to the planned city of Brasília in the central-west region for security reasons. Brazil has diverse regions and tropical weather, except for cooler winters in the south. It has great biodiversity and the dominant religions are Catholicism and Protestantism. Carnaval is a famous celebration occurring in February all over Brazil but especially in Rio de Janeiro and Salvador. Portuguese is