Answer: The slavery in the US should be decided by the people
Explanation: Under the concept of popular sovereignty, the people of each territory would decide whether or not slavery would be permitted.
Distinctive rock sequences on south america terminate at the atlantic ocean but reappear on the continent of Africa.
This is evidence towards the theory of Plate tectonics and the existence of Pangaea.
After the civil war, railroads connected the country on a national scale, boosting the economy and leading to mass production, mass consumption, and encouraging entrepreneurs.