Answer:
Westward Migration
Step-by-step explanation:
After the Gold Rush of California in the year 1849 and cultivation of fur industries that increased in the west, the people began to travel towards the west in search of better opportunities and better living.
There are people like the Mormons and Joseph Smith went to establish religious communities in the west. Some people were influenced by the Homestead Act of Lincoln that provided free lands to the settlers.
Thus these shows the desire of the people to move west for better natural and mineral resources and the economic opportunities increased the settlements in the West.