Question

being blank means being legally made a citizen of a nation.
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a wave of immigrants from latin american countries began with refugees fleeing the violence of the blank revolution in 1910–1920.
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Explanation:

For the first blank, "naturalized" is the term used to describe the legal process of becoming a citizen. For the second blank, the Mexican Revolution (1910 - 1920) led to a wave of refugees from Latin America (especially Mexico) emigrating.

Answer:

1. naturalized
2. Mexican