Question

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

Answer 1

Taking into account the statement above: "This theory states that when various ethnic groups come to the United States they keep their former cultural identities, become U.S. citizens but adding new aspects of what it means to be "American." identity. "

The answer is: The Melting Pot Theory.

Hope this helps.