Final answer:
The new friendship between Aiden and Phyllis is most likely based on homophily, the tendency for people to form social relationships with others who are similar to them.
Step-by-step explanation:
The new friendship between Aiden and Phyllis is most likely based on homophily. Homophily refers to the tendency for people to form social relationships with others who are similar to them. In this case, Aiden and Phyllis have formed a friendship because Phyllis has been driving Aiden's children to daycare, indicating that they have a shared interest in the well-being of the children.