The correct answer is - east side of Ecuador's mountains.
The Amazon River watershed is on the eastern slopes of the Andean mountain range where the country of Ecuador is located. This is where the huge amounts of rain create huge springs that give the basis for the Amazon River and all the other rivers that come into it from that region while going down to the enormous Amazon basin.
Answer: All of these
Explanation: Plates tectonics process is the process that usually takes place near the edges of the planes and it is caused when the earth's outer shell gets divided into various number of plates and get floated over the mantle surface. Faulting occurs when there is any sort of action like extension, compression or transformation in the tectonic plates .