Answer:
Railroads brought crops and grain to cities in the East and settlers to farms in the Great Plains
Step-by-step explanation:
The railroads were revolutionary for the development of the United States. The territories on the west, thus the Great Plains in that period, welcomed the railroads because they were producing a lot of crops and grains which were also of very high quality, and with the railroads they were able to transport them quickly, easily, and cheaply to the eastern cities. This led to much more food being transported to the East Coast. On the other hand, lot of people from the East Coast saw an opportunity in the Great Plains region, to have their own farms, produce a lot of crops or grains, and earn nice amount of money, so they were gradually moving in by using the railroads to do it easily and quickly.