What natural feature defines the boundary between the Appalachian Highlands and the Great Valley?
  • The Cumberland Gap
What environmental challenge has affected the Appalachian Mountains due to coal mining?
  • Habitat loss
  • Water contamination
What was the primary method of transportation in the Appalachian region in the early 19th century?
  • Horses and wagons
The Appalachian region is home to the highest concentration of what type of ecosystem in the U.S.?
  • Temperate deciduous forests
Which of the following national forests is located in the Appalachian Mountains of Kentucky?
  • Daniel Boone National Forest