How did the environment of SC affect the settlement of Native Americans?

What would lead a historian to consider two events to have a relationship of correlation rather than causation

Legacy of the new deal is positive or negative

Review the territory. all land from the bighorn mountains down to south dakota territory. what happened to this territory as a result of the treaty of fort laramie in 1868? it was confiscated by the us government, as a consequence for the battle of the little bighorn. it was given to the us government by the lakota sioux, who got reservation lands in exchange. it was gifted by the us government to the lakota sioux, who viewed it as a sacred place. it was allocated for lakota sioux to settle, but the us government maintained mining rights.