The invention of the mccormick reaper revolutionized the economy of what region prior to the civil war? northeast south west northwest

The McCormick reaper was the first mechanical reaper used in farming. It was designed to harvest grain grown primarily in the mid west but it has been said that it revolutionized agriculture all around the world because farmers went from cutting grain by hand to being able to cut it with a machine and allowed for increased production. So much grain was produced in the mid west that Chicago had to improve its infrastructure to be able to handle it all.