Question

which is the greatest internal force of change which has shaped the earth?
erosion
plate tectonics
weathering
fault lines

Explanation:

Erosion and weathering are external forces. Fault lines are a result of plate - tectonic activity. Plate tectonics involves the movement of Earth's lithospheric plates and is a major internal force that has shaped the Earth's surface, including the formation of mountains, ocean basins, and the creation of new crust and subduction of old crust.

Answer:

plate tectonics