Final answer:
American settlers migrated to the western United States for economic opportunities, to spread Protestant ideals, and for comfort and familiarity. Examples include seeking gold, starting ranches or farms, and following paths like the Oregon Trail.
Step-by-step explanation:
During the time of westward expansion in the United States, American settlers had various reasons for moving to the western territories. Some were motivated by the desire for economic opportunities, such as finding gold, starting ranches or farms, or gaining access to new markets for trade.
Others believed it was their duty to spread Protestant ideals or American values to the native inhabitants. For example, many settlers traveled along paths like the Oregon Trail in wagon trains. Additionally, European immigrants, particularly those from Northern Europe, also moved westward, often settling in ethnic enclaves for comfort and familiarity.