.B correct answer! Thanks!
Answer:
domestication
Explanation:
The process of changing plants or animals to make them more useful to humans is called domestication. The first farmers also learned to domesticate animals. Instead of following wild herds, they could now keep sheep and goats for milk, food, and wool.
As population grew more people moved west because of Gold rush and mining opportunities,The opportunity to work in the cattle industry,Faster travel to the West by railroad; availability of supplies due to the railroad and The opportunity to own land cheaply under the Homestead Act.