The ancestors of living Native Americans arrived in what is now the United States at least 15,000 years ago, possibly much earlier, from Asia via Beringia. A vast variety of peoples, societies and cultures subsequently developed.
Answer:
Differences in culture were causing issues.
Explanation:
It would be the oasis and aquifers provide water to the people. In the arid places people tend to supply by travelling around the desert and stopping in areas that has oasis and aquifers in order to replenish their water supplies. Also oasis and aquifers become stopping posts if it is a trade route for merchants and travelers in the arid regions.
Henry Ford improved B. assembly-line principles. Ford improved the assembly-line under the idea that it is more efficient for one person to do a single task over and over than it is for one person to put together an entire car. For instance, on the assembly line, a car would come by and Worker A would installs windshields. The car would then pass to Worker B who installs headlights and then to Worker C who adds the tires. This process is more efficient than Worker A, B, and C each putting together an entire car.
