In which part of the mainland is the Amazon River located? Where does the Amazon River begin?

In which part of the mainland is the Amazon River located? Where does the Amazon River begin? The largest tributaries of the Amazon River? The prevailing directions of the Amazon River?

So, it is worth knowing that this huge river is located in South America. It carries its waters from west to east. It crosses almost the entire mainland. It is also worth knowing that this river originates in Peru. To be more specific, its source is in the Andes. The largest tributaries of this river are precisely the Rio Negro and Madeira. And so it has more than two hundred tributaries. The prevailing direction of the current is from west to east. It is also worth knowing that it flows into the Atlantic Ocean.