Which statement best describes the governments of the city-states? The city-states voted on which city-state would lead the rest.
Each city-state was independent and had its own form of government.
The city-states were all part of one empire with the same government.
All city-states had a similar form of government, since they were located near one another.

Correct answer is Each city-state was independent and had its own form of government.

Explanation:

City-states were totally independent political entities, that had their own political systems, government... Sometimes they would made alliances with other city-states, but that wouldn't harm their autonomy. The best example for this are Greek or Sumerian city states.

All other options are not correct as they are not reflecting what the city states really were.