Brazil is to North America as is to North America?

The answer is canada.

Canada because Brazil is the largest country in South America and Canada is the largest country in north America.

south America because it is in south America

No, it's south of North America.And now, for the extra point: It is also south of Central America...

It was named America first, then Brazil and the places to the south were founded. They were then called North America and South America, for one is North and one is South.