A theme is a history surrounding it or a repeating moment, a period is a time that the themes were set in. hope this helps P
In the North, the economy was based on industry. They built factories and manufactured products to sell to other countries and to the southern states. They did not do a lot of farming because the soil was rocky and the colder climate made for a shorter growing season. ... In the South, the economy was based on agriculture.
Since the agriculture improved on the countryside it means that the people in the town improved with better quality of produce.
I would have to say technology is using fewer resources to manufacture goods more efficiently.
