Which is the best definition of naturalization?

The process of living and working in the U.S. in order to become a citizen
The act of taking an oath of loyalty to the U.S. in order to become a citizen
The legal steps taken for a citizen born in another country to become a U.S. citizen **
The classification of one who is born in another country but lives in the U.S. permanently
Wording is a bit weird on this one
Am i right?

The correct answer is C.

The definition from Merriam-Webster is "the course of action undertaken to become a citizen of a country other than the country where one was born."

Yes, you are correct. The best definition of naturalization is the legal steps taken for a citizen born in another country to become a U.S. citizen.

Yes, you are correct. The best definition of naturalization is: "The legal steps taken for a citizen born in another country to become a U.S. citizen." Naturalization is a legal process by which individuals who were not born in the United States can become U.S. citizens. This process typically involves fulfilling certain requirements such as living in the U.S. for a specified period of time, demonstrating good moral character, passing English and civics tests, and taking an oath of allegiance to the United States.

Yes, you're right.