The effort undertaken on the part of the federal government to supply cheap electrical power for homes and factories in a seven-state region, preventing flooding, and putting the federal government in the business of selling electricity by building a series of dams was called:.

The Tennesse Valley Authority

Explanation:

The Tennessee Valley Authority was created by Congress in 1933 to provide cheap electrical power, prevent flooding, and improve infraestructure in an area that was being particularly affected by the Great Depression: the Tennesse Valley area which includes most of Tennessee, and parts of Kentucky, Virginia, North Carolina, Georgia, Alabama, and Mississippi (hence the name of "seven-state region").

norsemen from northern countries had made earlier journeys