Backgrounds refer to the various aspects of a person's history, such as their education, upbringing, and experiences. These factors can greatly influence an individual's personality and worldview.
Similarity refers to the extent to which two individuals share common characteristics or interests. It is often associated with stronger attraction between people.
Homophily: Homophily is the tendency for individuals to associate with others who are similar to themselves in terms of various attributes like backgrounds or attitudes.