What is the economic causes of migration? Also it would be great if you can answer my question in point form!

How did the new working class of the industrial revolution differ from the working classes of the earlier, farm based economy?

Which action by the us war department angered chief red cloud to the point that he refused to sign the treaty of fort laramie ? a) the killing of buffalo by the united states troops b) the appointment of troops to the powder river basin c) the burning of parts of the powder river basin d) the murder of chief red cloud’s wife

According to this contract, when will the sharecropper receive his payment?