Question 8(multiple choice worth 3 points)

political map of north america. national borders, state and provincial borders and major rivers are marked.
©2011 map resources

what natural boundary form the border between the united states and mexico?

gulf of mexico
atlantic ocean
great lakes
rio grande

Ifound this on google “simply, the working conditions were terrible during the industrial revolution. as factories were being built, businesses were in need of workers. with a long line of people willing to work, employers could set wages as low as they wanted because people were willing to do work as long as they got paid.” i hope this you for what your looking for.