Answer:
Aaron's inclination to associate and bond with people who share similar backgrounds is an example of homophily.
Step-by-step explanation:
The term homophily was used by sociologists in the 50's to explain our human tendency to surround ourselves and interact with people that are similar to us. The term didn't really catch on and was not frequently used, however, recent social events have given proof of the polarization of population into groups of people that share characteristics, such as race, interests, etc. Scientists have used the term to analyze our social networks, even the ones we form online, finding that people's networks are mostly homogeneous.
Aaron's social network is consistent with scientific evidence on the matter, he also interacts mainly with people who live near to him and shares his values, age, and interests.