People of similar racial-ethnic backgrounds and social classes tend to have more contact with one another in part because they are likely to live in the same neighborhood and attend the same schools. These shared experiences may also lead them to pair up in romantic relationships. This is an example of the principle of ___.

homophily

Explanation:

Based on the scenario being described within the question it can be said that this is an example of the principle known as homophily. This refers to the tendency for individuals to have ties/relationships with other individuals who have the same social aspects as them. Such as being of the same racial-ethnic background or even social class.

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