किसी विशेष उद्देश्य या हित के लिए संगठित लोगों के समूह को क्या कहा जाता है?

In Sociology, the term 'norm' is defined as a:

Which one of the following correctly defines the concept of 'social structure'?

Which one of the following is NOT an essential element or basis of a 'community' in traditional sociology?