To forbade all settlement past a line drawn along the Appalachian mountains
Because they actually belonged to the feudal lord who let serfs work on his land in exchange for food while at the same time the serfs were offered protection in times of despair and need.
D.
For example in New York, the Erie Canal was dug to connect Lake Erie in western NY to Hudson River in eastern side of NY.
Waterway built to allow ship travel vs. slower overland wagons etc.
Answer: The Soil: The best soils are found in the southern highland valleys where volcanic eruptions have enriched the earth.
Explanation: