The statement that best explains the difference between the Mayan civilization and the Roman Republic is:
The Mayan civilization was led by a demigod monarch, and each Mayan city operated independently with its own culture and laws. The Roman Republic was a centralized system led by two consuls and a senate.
This statement highlights the contrasting political structures and governance of the two civilizations, showcasing the decentralized nature of the Mayan city-states compared to the centralized Roman Republic.