<span>Population records are a bit inaccurate for this time. It is estimated that between 20% and 60% of Europe's population was wiped out due to the Black Death. </span>
I believe Rome's economy was built on agriculture. Agriculture and Trade dominated Rome's economy.
Answer: The Federal System has changed over time by clear divisions of powers between national, state, and local governments in the early years of the republic to greater intermingling and cooperation as well as conflict and competition today.
Explanation: