समाजशास्त्रीय संदर्भ में, निम्नलिखित में से किसे प्राथमिक समूह (Primary group) का एक आदर्श उदाहरण माना जाता है?

Which of the following is considered the primary and basic social group in society?

A researcher is comparing the influence of family and student councils on learners' values. Which distinction between social groups is most relevant for understanding the nature of these influences?