Welcome to Manaus, Brazil!

Correct!
Manaus was founded in 1689 in the northern region of Brazil.
The name "Manaus" has its genesis in "Manaos", the name of the indigenous tribe who inhabited what is now Manaus many years ago.
What is now a full city began as defense created by Portuguese settlers against Spanish invasions.



Question:
When leaving Manaus, what major river must you take to get to the Atlantic Ocean?

Amazon River
Nile River
Missouri River