- Country: A country is a political entity larger than a state, encompassing a significantly larger population than a Band or Tribe.
- Caste: Caste is a system of social stratification, not a form of governance.
- Community: A community is a group of people, often from a specific region or background, but it lacks formal political structures.
- Tribe: A tribe is a social and political organization, larger than a band but smaller than a state.
Step 1: Determine the appropriate level of governance.
A Tribe represents a social unit with governance structures exceeding those of a band, but not reaching the scale of a state or country.
Final Answer:
\[
\boxed{\text{The correct answer is (4) Tribe.}}
\]