What are the forces that originate inside the earth and bring changes on the surface of the earth?

The question describes forces that originate inside the Earth and cause changes on its surface. The provided text mentions "sudden changes originate inside the earth due to volcanic or earthquake activities."

These forces are known as internal forces or endogenic forces, contrasting with external (exogenic) forces like weathering and erosion.

The forces which originate inside the earth and bring changes on the surface of earth are called internal forces or endogenic forces.