5 How do the economies of the Rio Grande Valley and Big Bend National Park differ? |

ExplaAt the heart of the desert there is no drought, there is only an occasional mitigation of dryness," so stated western historian Walter Prescott Webb. Big Bend National Park marks the northern extension of the Chihuahuan Desert, the largest of North America’s four deserts. Although water sources dot the landscape and flash floods occur after heavy rains, the Rio Grande provides the park’s most prominent source of water.

The Rio Grande begins its journey to the Gulf of Mexico from springs and snow melt high in the southern Rocky Mountains of Colorado. Along its way to the sea, the Rio Grande travels almost 2,000 miles. As it flows southward, its waters are diverted for flood control, irrigation, power generation, municipal uses, and recreation.nation:

the answer is d. amendments.