Here's why:

* Relief refers to the difference in elevation between the highest and lowest points in a particular area. Mountains are characterized by their significant elevation gain compared to the surrounding land.

* Landforms are natural features of the Earth's surface, and mountains are distinct and recognizable features.

Other types of relief landforms include:

* Hills: Smaller, less steep elevations than mountains.

* Valleys: Low areas between hills or mountains.

* Plateaus: Large, flat areas elevated above the surrounding land.

* Canyons: Deep, narrow valleys often carved by rivers.