1. Why did Plains Indians tribes traditionally follow the buffalo migration?
A. primarily for sport
B. to domesticate the bison for agriculture
C. to enable young men to practice the skills necessary for warfare
D. to supply the demand for hides for the buffalo robes popular in eastern carriages and sleighs
E. to provide for food, shelter, fuel, tools, weapons, and other necessary items
2. Frontier communities were characterized by ?
3. The First Transcontinental Railroad was ?