What type of elevation does Allegheny Front and Appalachian Platea have in common?
Allegheny Front: The Allegheny Front is the major southeast- or east-facing escarpment in the Allegheny Mountains in southern Pennsylvania, western Maryland, and eastern West Virginia, USA. Appalachian Plateau:  The Appalachian Highlands are a mountain range that run down the entire east coast of the United States.
i don't know