Final answer:
The democratic feature of the Roman government adopted by the United States is the tripartite system with separation of powers, inspired by the Roman Republic's approach to balance powers among different governing bodies.
Step-by-step explanation:
The democratic feature of the Roman government that was adopted by the United States is a tripartite system with separation of powers. This feature is evident in the U.S. Constitution, which established a system with separate legislative, executive, and judicial branches. The inspiration for this division comes from the Roman Republic, which also had a complex system of government that balanced powers among various institutions.
In the Roman Republic, there were multiple assemblies and a senatorial body, which advised the elected consuls. The consuls, who would lead the government, had their power checked by limited terms and by each other. Similarly, in the United States, the presidential republic features a president with defined limitations and the two houses of Congress, along with a judiciary that together maintain a balance of power.
The framers of the U.S. Constitution intentionally designed this mixed government, hoping to prevent any single branch or individual from gaining too much power, reflecting the approach taken by the Roman Republic in its governance.