Due to the railroads, American settlers were able to travel west in larger numbers. How did this migration impact American Indians?
American Indians'way of life changed because buffalo herds were destroyed for commercial markets,
American Indians voluntarily went to reservations because they needed to find food and shelter.
American Indians became cattle ranchers in order to survive a decrease in income.
American Indians faced economic decline because they could no longer sell buffalo meat.

you didn't give any answers to choose from so i can't with this but, i do know something that the mexican government would be worried about and that is the wall that donald trump is currently trying to get up.

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years

the answer is a. physical map