Answer:
1. World Trade Organization
2. North American Free Trade Agreement
3. The European Union
Explanation:
a. World Trade Organization (WTO): Oversees trade agreements among over 150 member nations and arbitrates trade disagreements among member countries. The world trade organization (WTO) is an intergovernmental organization that set rules, policies and regulates global trade across the world. It was established officially on the 1st of January, 1995.
b. North American Free Trade Agreement (NAFTA): Created a free-trade zone consisting of the United States, Canada, and Mexico with the purpose of eliminating trade barriers between these countries. It officially became effective on the 1st of January, 1994.
c. The European Union (EU): An agreement between over 25 nations, which abolished tariffs among member countries and standardized policies on agriculture, transportation, and business practices. It was established officially on the 1st of November, 1993. Some of its member countries are Sweden, Italy, Germany, Portugal, Croatia, Russia, France, Spain, Netherlands etc.