Here are the correct matches for each term with its description:
-
A government tax on imports and exports - #: Tariff
-
Unimpeded exchange and flow of goods and services between trading partners regardless of national borders - :: Free trade agreement
-
Halted the import of Canadian beef to the U.S. - :: Bovine spongiform encephalopathy
-
An alliance formed by countries with similar political or economic goals - #: Blocs