Explanation:

- Primary group: This option refers to small groups marked by close personal and emotional connections, like family or close friends. These groups provide emotional support and a sense of belonging.

- Answer: Option 2 – Primary group

- Reference group: This is a group that individuals compare themselves to for self-evaluation, but it doesn’t require close interaction.

- Interest group: These are groups formed around a common interest or goal, but emotional closeness is not necessary.

- Secondary group: This group involves larger, impersonal, and goal-oriented relationships, like colleagues or professional associations.