the answer is The Tennessee Valley Authority which is a federal operation created on 6/18/1933-34 during the great depression by the congressional charter.
Africa is known for their precious diamond mining so diamond is one. Oil is also another big thing
C. Brakes
As these are important if you need to stop suddenly
Was important bc it was an American initiative to aid Western Europe, which the United States gave over 12$ billion in economic support to help rebuild Western Europe after the end of World War 2
They made voting faster and reduced fraud.