Explanation:
a representation of a plan or theory in the form of an outline or model
The most important effects that the Mongols had on Europe and Asia were increasing the flow of goods and knowledge between the two regions, the unification of present day Russia and the introduction of new diseases. For example, knowledge of gun-making traveled from Asia to Europe during Mongol rule<span> </span>
Answer:
The nullification crisis was a conflict between the U.S. state of South Carolina and the federal government of the United States in 1832–33. Calhoun, who opposed the federal imposition of the tariffs of 1828 and 1832 and argued that the U.S. Constitution gave states the right to block the enforcement of a federal law.
