Final answer:
Homogamy is the tendency to choose romantic partners based on similarities in background and group membership. It is a natural inclination for individuals to be attracted to those who share commonalities in values, interests, and experiences. The correct answer is option A.
Step-by-step explanation:
The tendency to choose romantic partners based on similarities in background and group membership is called homogamy. Homogamy is the tendency for people to form social networks, including friendships, marriage, business relationships, and many other types of relationships, with others who are similar. It is a natural inclination for individuals to be attracted to those who share commonalities in values, interests, and experiences.