<span>The answer would be D. years old</span>
It is very much hard to answer.
It was mainly because of how the North and the South of America had different lifestyles and economy's. You would be surprised to know that the Democratic party back then supported Slavery and the republicans dint support Slavery.
Plain Answer: Because of Slavery, Way of Life and Different Economy. The Democratic Party would do anything to keep themselves supported.
The invention of the steam engine impacted industry in a variety of ways, not the least of which involved the European exploration and colonization of the African continent. Transportation, in general, was improved, proving profitable to businesses which could now transport products easier and faster. Another change of importance involves the location needed for factories, which no longer needed close proximity to rivers for energy.
The answer is A as river valley civilizations relied on rivers as a source of life. River valleys like Egypt, Mesopotamia and Xi, the rivers brought silt and made the soil very fertile, it also brought fresh water and fish to eat. People can also move fast using rivers.
