I assume you are talking about the legal naturalization process.
Explanation:
Naturalization is the legal process a non-U.S. citizen undergoes to become a citizen of the United States. A person can become a citizen of the United States through one of the following ways: Through the naturalization process. By deriving citizenship from his or her parent when the parent naturalizes.
These legal requirements help the immigration service ensure that only those people who are sincere in their desire to become U.S. citizens become naturalized.