Short answers, pulled from the story.
A multi-party system is defined as a political structure where more than two meaningfully distinct parties regularly run for office. Education 2020 describes this state as having several major and many lesser parties that seriously compete for public offices. These groups win seats through elections rather by inheriting power or seizing it by force.
Proportional representation forms of election make multi-party systems common compared to winner-take-all implementations. A party needs only a fraction of the total vote to secure a seat under proportional rules. This mathematical reality encourages the formation of diverse political organizations across the spectrum.
No single party achieves a parliamentary majority on its own during most elections in these systems. Results frequently produce what are sometimes called hung parliaments requiring multiple political parties to negotiate to form a coalition. This agreement allows them to make laws or form an executive government through cooperation.
Argentina, Armenia, Belgium, Brazil, Canada, Chile, Denmark, Finland, France, Germany, Iceland, India, Indonesia, Ireland, Israel, Italy, the Netherlands, Norway, the Philippines, Poland, Sweden, Turkey, and Ukraine utilize these systems. These nations demonstrate how proportional representation functions across different continents and cultures while maintaining unique sets of rules.
This tendency is known as Duverger's law within political science circles describing how proportional representation forms create more parties. Countries using proportional representation allow smaller parties to gain traction alongside larger ones. Winner-take-all elections often consolidate power into fewer entities over time instead.