- Country: A country is a political entity that is larger than a state and involves a much larger population than a Band or Tribe.
- Caste: Caste is a social stratification system, but not a form of governance.
- Community: A community refers to a group of people, often of a particular region or group, but it is not a formal political system.
- Tribe: A tribe is a social and political organization that is larger than a band but smaller than a state, making it the correct answer.
Step 1: Identifying the correct level of governance.
A Tribe is a social unit with governance structures larger than a band, but not as extensive as a state or country.
Final Answer:
\[
\boxed{\text{The correct answer is (4) Tribe.}}
\]