Final answer:
Nora's decision to put her shoes in a locker after seeing others do the same is an example of social conformity, which is when individuals follow group norms to fit in.
Step-by-step explanation:
The concept that helps explain Nora's action of putting her shoes into a locker after observing the behavior of others in the community recreation center is a. Social conformity. Social conformity is the extent to which an individual complies with group norms or expectations. In a setting such as a recreation center changing room, people often look to each other to understand the appropriate behavior in that context. When Nora notices others storing their shoes in lockers, she is likely influenced by the desire to fit in and to follow the socially accepted behavior in that particular environment. This tendency to conform can be observed in various scenarios, from fashion choices to participation in local community groups. The act of conforming to group norms is a way for individuals to feel integrated and avoid standing out in a negative way.