Answer:
The Mongolian Empire made travel safe.
Explanation:
Answer:
"Arizona, a southwestern U.S. state, is best known for the Grand Canyon, the mile-deep chasm carved by the Colorado River. Flagstaff, a ponderosa pine–covered mountain town, is a major gateway to the Grand Canyon. Other natural sites include Saguaro National Park, protecting cactus-filled Sonoran Desert landscape. Tucson is University of Arizona territory and home to the Arizona-Sonora Desert Museum."
Explanation:
The correct answer is C, desalination
<span>Choices are
A. permanent migration B. periodic movement C. transhumance D. commuting
And it was B.</span>