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

Naturalizacion is the process of legal steps taken for a citizen born in another country to become a U.S. citizen .

Explanation:

Naturalization is the process by which the citizen of a country acquires the nationality of the United States, with which he has acquired some links as a result of the stay and the residence maintained over time in a legal manner in America, or by other reasons - such as marriage with an American or the direct descent of American parents, grandparents, etc - .

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".