Answer:
The reasons that cities boomed during the Middle Ages are more employment opportunities, increased trade, and growing interest in culture and art.
Per capita income is the measure of the amount of money earned per person a geographic region. The formula is total income of area divided by the total population.
Pacific Plate slowly passes over a magma-generating hot spot within the mantle.
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Purple could mean many things but if it's talking about climate and such then cooler colors like purple are usually meaning colder climate
18 States - North Carolina, Ohio, Alabama, Connecticut, New York, Georgia, Kentucky, Maine, Maryland, Massachusetts, Tennessee, New Jersey, New Hampshire, Pennsylvania, South Carolina, Vermont, West Virginia, and Virginia. The Appalachain mountains are found in these states, so it is only logical sediments could be found inside of them.