<span> a revolution in communication occur in the 15th century
The first revolution in communication happened after Johanne Guttenberg developed the first movable printing in 1439, which allow people to easaily write and exchange information from one place to another</span>
Answer:
Trade leads to the sharing of ideas, resources and culture.
Explanation:
Trading usually happens when two civilizations need a certain resource that they do not have, and that another civilization has. Trading is the more peaceful route, in which both civilizations get something they need while giving something that they have a surplus of. Trading also generally leads to alliances and the intermingling of the two civilizations, including culture, ideas, etc.
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In the American federal system, there are limitations on national government's ability to carry out its policies through the executive branch of state governments. For example, in Printz v. United States<span>, 521 U.S. 898 (1997) the Court held that the national government could not directly require state law enforcement officers to conduct background checks under the Brady firearms legislation. The court explained that prior decisions warned that "this Court never has sanctioned explicitly a federal command to the States to promulgate and enforce laws and regulations." And yet, there are significant advantages in a federal system to obtain state assistance in the local implementation of federal programs. Implementing such programs through national employees would significantly increase the size and intrusiveness of the national government. Moreover, local implementation may assure that these programs are implemented in ways that take local conditions into account.</span>
D.. it is the Great Plains
For the slave's freedom laws were denied considerably more so now crossing the northern outskirt doesn't set you free you must be liberated now by getting away to Canada and some northern states utilized individual freedom laws to invalidate the criminal slave act, written to help the south.