USA HISTORY

Detailed explanation-1: -Waterways and a growing network of railroads linked the frontier with the eastern cities. Produce moved on small boats along canals and rivers from the farms to the ports. Large steamships carried goods and people from port to port. Railroads expanded to connect towns, providing faster transport for everyone.

Detailed explanation-2: -In America, canal building began in the 1790s to connect the 16 States to the lands west for commerce, as well as for taking passengers and families wanting to relocate further west. Unknown to the colonists were the Hohokam’s canals in a land they never dreamed of visiting. The 363-mile Erie Canal was built in 1825.

Detailed explanation-3: -Industrial expansion and population growth radically changed the face of the nation’s cities. Noise, traffic jams, slums, air pollution, and sanitation and health problems became commonplace. Mass transit, in the form of trolleys, cable cars, and subways, was built, and skyscrapers began to dominate city skylines.

Detailed explanation-4: -The first cities appeared thousands of years ago in areas where the land was fertile, such as the cities founded in the historic region known as Mesopotamia around 7500 B.C.E., which included Eridu, Uruk, and Ur.