<span>When
the different ports of Boston, New York, Philadelphia, and Baltimore opened in
the 1800s cities started to grow. It transformed the demographic landscape of
America. Manufacturing was the main source of the income America’s income. In
the late 1700s, there were only 12 cities in the US but by the time the ports
were opened 16% of Americans lived in cities. </span>
Answer:
Image result for Give 3 examples of what extra powers the marcher lords had
Marcher lords could build castles, a jealously guarded and easily revoked Royal privilege in England. Marcher lords administered laws, waged war, established markets in towns, and maintained their own chanceries that kept their records (which have been completely lost).
Explanation: