1) main reason was to obtain free land from the federal government in the western states, provided that you agreed to live on the land.
2) some where drawn to the rather lawless and hazardous environment of the west.
3) the gold rush of 1849 in California was a major draw for those wanting to strike it rich.
Most bill can originate in either house of Congress. One type of bill, however, must begin in the House of Representatives. What type of bill is this? The Senate may propose or concur with Amendment as on other bills
Well, if it is a mother culture, then Mesoamerican cultures would come from it later. I think it would probably be the second, the ball game, because it was originally from the Olmecs, but if it is multiple choices, then it is all but the tool-making techniques.