Which of the following was the first natural barrier to expansion of the frontier for american colonists?

What is a connection among sectionalism, slavery, and states’ right as cause of the civil war? how did the southern response to the 1860 election results demonstrate this connection?

Which statement best describes the economy of india in the late 1700s? in the late 1700s, british farmers produced cotton that was shipped to indian factories to produce textiles. in the late 1700s, indian farmers produced cotton that was shipped to british factories to produce textiles. in the late 1700s, taxes were lowered to promote struggling manufacturing and trade industries in india. in the late 1700s, taxes were raised to gain revenue from the growing manufacturing industries in india.

Which of these played the biggest role in increased urbanization in the late 1800s? a) transportation improved b) the military was stronger c) no one was farming anymore d) steam power was discovered