Family,close friends,and school- or work-related peer groups would all be examples of:

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Primary groups are characterized by intimate, long-term, face-to-face interaction and strong emotional ties among members. Examples include family, close friends, and school- or work-related peer groups. Acting groups refer to those who come together briefly for a specific purpose or task. Formal groups have a specific structure and goals, often with designated leaders and official rules or procedures. Secondary groups are larger, more impersonal, and characterized by weaker emotional ties, and may be formed for a specific purpose or around a specific interest or activity.

Family,close Friends,and School- or Work-Related Peer Groups Would All Be