Final answer:
People tend to choose friends and romantic partners who are similar in race, ethnicity, religion, values, education, and age. This is known as homophily and is based on the tendency for people to form relationships with others who are similar to them.
Step-by-step explanation:
People tend to choose friends and romantic partners who are similar in race, ethnicity, religion, values, education, and age. This is known as homophily, the tendency for people to form relationships with others who are similar to them. Sharing common qualities and experiences makes it easier to get along and form connections with others.