Which source of attraction explains why we are more likely to form a relationship with our next-door neighbor than we are with someone living further away?

A) reciprocation of liking
B) competence
C) similarity
D) proximity

Proximity refers to the physical closeness between individuals. Research has shown that we are more likely to form relationships with people who are geographically close to us, such as our neighbors, due to the ease of interaction and the increased familiarity that proximity provides.