<span>These difficulties eventually resulted in the development of a transcontinental railroad. All the inventions and developments in the world are meant to make people's lives easier and comfortable, and this event is not an exception. In order to blur terrotorial boundaries the First Transcontinental Railroad was introduced to the US. It connected the eastern nad western parts of America.</span>
Answer: The very first cities were founded in Mesopotamia after the Neolithic Revolution, around 7500 BCE. ... units, as well as how trade routes allowed certain cities to expand and grow ... Discuss the problems urbanization created for newly formed cities ... The growth of modern industry from the late 18th century onward led to ...
Explanation:
becuase it was the slaves because there were alot of people needed more people
The main difference is between the house and the senate is the president of the speaker.