Review the maps, then use the drop-down menus to answer the questions. Which civilizations covered the most area of land? What physical feature do the African and Asian civilizations share? What is the land like between Mesoamerica and South America?

How does nafta affect relations between the united states and canada? a. it bans immigration between the two countries. b. it opens the borders between the two countries. c. it raises taxes on trade between the two countries. d. it allows free trade between the two countries.