How would u. s. society change? explain your response.

He transcontinental railroad was built in the 1800s to connect Council Bluffs, Iowa, with the San Francisco Bay and revolutionize transport in the U.S. The 1850s were a time of westward expansion for the United States. ... These two companies then began constructing what would become the transcontinental railroad.

Will this help?  The question is too vague.

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !