Question

An internal force that helps create new landforms is

a. mechanical weathering.
c. volcanism.
b. glacial movement.
d. wind erosion.

Answer 1

The answer is C ;)).

Answer 2

This would be c. volcanims. The other forces would not be described as "internal" (as in, internal to earth" - but rather external, such as wind erosion is caused by the wind working on the rocks.