The answer is - Unlithified or poorly lithified sediments.
Rocks can exhibit ductility only if there's ulithified or poorly lithified sediments. With other words, this process can occur only if the rocks that are bending over under the pressure if there's soft layer/layers that will allow this to happen without causing big opposing pressure and make the rocks break.
The Tennessee Valley Authority is a corporation that was established as part of FDR's New Deal programs. One of the purposes of this corporation was to avoid the excessive presence of private companies in the modernization of the valley.
The TVA provided people with many jobs during the Great Depression. However, it achieved more than this. The TVA managed the natural environment of the region by controlling flooding and erosion. It also increased industrial activity in the region by building dams and power plants.
Division of ethnic groups to different parts of the continent
