An extended family goes beyond the nuclear family (father, mother, and children) and it involves a nuclear family with the presence of other adult or young family members like the grandparents, uncles, cousins, aunties, etc, all living in the same household.
If you take a look at a map with latitude and longitude included on the map you find that the point 15 degrees south and 45 degrees west is located in Brazil. Brazil is a country located in South America, therefore, this point falls within South America.
