Answer:
Because of the fast pace that people were moving to cities, housing, sewage and social systems, and transportation were unable to keep up.
Explanation: disease were prevalent problems in all urban centers; city planners and inhabitants alike sought new solutions to the problems caused by rapid urban growth. Living conditions for most working-class urban dwellers were atrocious.
The Appalachian Mountains lay west of the thirteen colonies. It formed a natural barrier between the colonies and all land to the west
The Tuskegee Airmen were the first black military aviators in the U.S. Army Air Corps (AAC), a precursor of the U.S. Air Force. Trained at the Tuskegee Army Air Field in Alabama, they flew more than 15,000 individual sorties in Europe and North Africa during World War II.
Innovations in agricultural technology increased the production of cotton. As a result, Southern plantations needed greater numbers of enslaved workers. They saw slavery as a sign of privilege.
