The correct answers to these open questions are the following.
Although there are no options attached we can say the following.
What criterion is necessary to become an American citizen?
Age, at least 18 years old. Must be a permanent legal resident in the United States territory, which includes having its alien card. The individual has to show good moral character, know about the history and culture of the United States, and be proficient in English. The persona has to take an English examination.
A person’s required level of English is tested during the naturalization process. The areas of basic knowledge that are included in the civics test are the following. An English test to prove the applicant can read, write, and speak good English. The other area is a civics test that tries to find that the applicant has knowledge about the history of the United States and its form of government.