In a(n) , a group of countries are committed to removing all barriers to the free flow of goods and services between each other but pursue independent external trade policies.

European Union

Explanation:

The European Union is one of the world's most open economies. The EU is also the largest single market in the world. Free trade between Member States is one of the fundamental principles of the EU, so the EU is also committed to liberalizing world trade. From 1999 to 2010, EU external trade doubled and now accounts for more than 30% of EU gross domestic product (GDP). The EU is responsible for Member States' trade policies and negotiates agreements with them. In international trade negotiations, the EU's single appearance has more influence than individual Member States.

Yes you are cute answer theories to explain the colonization of the new world the last great habitable landmass to be occupied by humans focus on the bering land bridge, or beringia, which emerge by siberia and alaska the last ice age.

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.