Final answer:
The Rocky Mountains, the Cascades, and the Basin and Range are created by convergent plate boundaries.
Step-by-step explanation:
The Rocky Mountains, the Cascades, and the Basin and Range are all created by the convergent plate boundary.
Convergent plate boundaries occur when two tectonic plates collide. In the case of these mountain ranges, the collision is between the North American Plate and the Pacific Plate. The plates are forced together, causing buckling and uplift of the Earth's crust, resulting in the formation of mountains.
Learn more about Plate tectonics and mountain formation