Final answer:
Proximity and similarity are two factors that influence the formation of relationships. People tend to be attracted to others who are similar to them in terms of background, attitudes, and lifestyle.
Step-by-step explanation:
**Proximity** and **similarity** are two factors that influence the formation of relationships. We tend to be attracted to people who are similar to us in terms of background, attitudes, and lifestyle. This is because sharing things in common makes it easier to get along and form connections with others. Similarly, **proximity** can also lead to the formation of relationships as we are more likely to interact with and get to know people who are physically close to us.