The phrase that best completes the diagram of the Roman Republic's Senate and Assemblies is The Congress.
What was the Roman Congress?
This was the legislative body of the Republic that was responsible for making laws.
It comprised of the Senate and the Assemblies of civilians, which meant that the U.S. Congress was modeled on the Roman style.
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Find out more on the Roman Congress at https://brainly.com/question/11917257.
