The best response that explains the most crucial element of each civilization is:
The Roman Republic’s senate and assemblies were crucial for decision making. The Inca Empire’s administrators helped the king keep order and law in different territories, no matter how large the empire was. The Mayan civilization had city-states that were less centralized than either the Republic or Inca Empire.
This response accurately captures the essential characteristics of each civilization, emphasizing the importance of governance structures and the varying degrees of centralization in their political systems.