What made it possible for people of all ethnic backgrounds to participate freely in U.S. politics?

Decisions are made by people with power, and in all societies there are some people who are more powerful than others because of factors, such as age, gender role, ethnicity, political affiliation, economic situation (13)

Explanation:

Ans: The mild climate enabled Romans to grow wheat, grapes, and olives. This abundance o food supported the people and allowed Rome to prosper. While the climate made year-long agriculture possible, Rome also had the advantage to be near water. The Tiber River helped the agricultural system to prosper.