Regional elevation can be decreased by:

A) normal faulting that thins the crust
B) erosion
C) cooling of the crust
D) all of these

Normal Faulting

Normal faulting occurs when the crust is extended and a rock mass is displaced downward along a fault plane relative to another rock mass, due to tensional forces.

Regional Elevation

The average height of a specific area above sea level, which can influence climate, weather patterns, and habitat types.

Erosion

A natural process where material from the Earth's surface is worn away by natural agents such as water, wind, or ice.