What is the purpose of the N-400 application?

The purpose of the N-400 application is to apply for U.S. citizenship. This form is specifically designed for lawful permanent residents (green card holders) who wish to become U.S. citizens through the naturalization process. Completing the N-400 involves demonstrating eligibility based on factors such as residency, moral character, and knowledge of U.S. government and history.

The other options describe different immigration processes. A work visa application is associated with non-immigrant visas that allow individuals to work temporarily in the U.S. Renewing a green card pertains to maintaining permanent resident status, which involves submitting a different form (I-90). Seeking asylum involves a separate process to request protection in the U.S. based on fear of persecution in one’s home country and is not linked to the N-400 application.