Explanation:

- Denudation (Option 1):

- This involves the processes of weathering, mass wasting, erosion, and transportation.

- Denudation refers to the wearing away of the Earth's surface, leading to a reduction in elevation and relief of landforms.

- Correct Answer.

- Endogenetic process (Option 2):

- These processes originate from within the Earth.

- They include activities like volcanic eruptions and tectonic movements.

- Diastrophism (Option 3):

- Refers to the deformation of Earth's crust.

- It involves processes such as folding, faulting, and warping.

- Mountain building (Option 4):

- Involves the formation of mountains through tectonic forces.

- Includes processes like orogeny (mountain-forming events).

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