<span>Factories and their corresponding jobs were located in cities and created economic opportunities for migrants.</span>
I think the correct answer is crust. I am really sorry if I am wrong.
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:
-Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere.