The Andes are labeled with number 4.
The region labeled with number 3 is Patagonia.
By the change of environment , by the process
The construction and operation of dams in the Colorado River have multiple benefits that include having increased water for irrigation and domestic supply, generation of hydroelectric power energy, providing improved aquatic recreation and wildlife habitat, and flood control.
The Mississippi-Missouri-Ohio river system is the largest and most significant river system in the world.
Answer: The Northern European Plains.
Explanation: I hope this answers your question :)
