is a theory that when various peoples and ethnic groups come the United States they retain their former cultural identities, become U. S. citizens but adding new aspects of what it means to be "American."

The melting pot theory.

Explanation:

This conception looks at the United States as a place where all the immigrants from the outside world come and become Americans, they assimilate American values and norms, and make their children assimilate them, despite retaining much of their original cultural identities. In this process, they make contributions to the American social fabric.

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