What was a major reason for Americans to move to the Sunbelt?

Employment Opportunities.

Explanation:

Sun belt is actually a region that can be found in the United States. This can be found just across Southwest and Southeast. Actually, the main reason why the Americans decided to transfer to this region is to find jobs that are related to aerospace, electronics, and defense.

Answer: The major reasons Americans relocated to Sunbelt were because of job opportunities, union growth, bigger homes, massive incomes