Final answer:
The perspective that aligns with the mother's view on joining a fraternity for positive peer pressure and new experiences is structural functionalism, which sees social structures as cooperating for societal stability.
Step-by-step explanation:
The perspective that best describes the views of the mother who encourages her son to join a fraternity is c. structural functionalism. This sociological framework views society as a complex system whose parts work together to promote solidarity and stability. In this scenario, the mother believes that the fraternity can positively influence her son to try new activities such as volunteering and attending formal events, which aligns with the structural-functionalist perspective that social structures (like a fraternity) serve a purpose in society by promoting cooperation and shared values.