How is citizenship in the United States primarily acquired?

Citizenship in the United States is primarily acquired through two main avenues: birth within the country and the naturalization process. The concept of "birthright citizenship" means that anyone born on U.S. soil automatically acquires citizenship, as established by the 14th Amendment of the Constitution. This provision ensures that individuals who are born in the U.S. are recognized as citizens, regardless of their parents' citizenship status.

Additionally, individuals can also become citizens through the naturalization process, which allows foreign nationals to acquire U.S. citizenship after fulfilling specific requirements, including residency, knowledge of U.S. history and government, and taking an oath of allegiance. This process provides a pathway for those who were not born in the U.S. to become full citizens.

Therefore, the correct answer encompasses both methods of acquiring citizenship, recognizing the significance of both birthright and naturalization in the context of U.S. citizenship law.