Mountain of denudation is another term for

1. Analyze the question The question asks which type of mountain is also called a "mountain of denudation."

2. Explain the concept Denudation is the wearing away of the Earth's surface by weathering, erosion, and mass wasting. Mountains formed this way are not built up by internal forces. They are left standing when the surrounding softer rock is worn away.

These are called residual mountains (also relict or mountains of denudation). Examples include:

• Mountains left after long erosion of an old plateau or fold mountain
• Inselbergs and monadnocks, such as the Jos Plateau remnants and Olumo Rock in Abeokuta (an inselberg, a related residual landform)

3. Solution, option by option

• A. Volcanic mountain: built up by the eruption and accumulation of lava and ash. Constructional, not denudational.
• B. Fold mountain: formed by compression and folding of crustal rocks (e.g., the Alps and Himalayas). Tectonic, not denudational.
• C. Block mountain: formed when land is uplifted between faults (e.g., the Horst of the Vosges). Tectonic, not denudational.
• D. Residual mountain: formed by erosion removing the surrounding rock and leaving the more resistant mass standing. This is the mountain of denudation.

4. Answer The correct option is D. residual mountain.

5. Tip Link the words: Denudation = destroying/wearing down, so the mountain is what is left over (residual). Remember the groups:

• Fold, block, volcanic = built up (constructional/tectonic)
• Residual = worn down (denudational)