Final answer:
In regions with an active convergent margin, a folded mountain range is typically found due to the compression and buckling of the Earth's crust. The Alps and Andes are prominent examples of such ranges, which may also exhibit volcanic activity.
Step-by-step explanation:
Anywhere with an active convergent margin we have a folded mountain range. At these boundaries, the Earth's crust is shortened, and compression causes the formation of mountain ranges as rock layers are deformed into anticlines and synclines. The collision of tectonic plates under great pressure not only raises mountains but can also lead to volcanic activity therefore both folded mountains and volcanic mountains are common in these regions. For instance the Andes Mountains in South America are an example of such a range, formed by the subduction of the oceanic plate beneath the continental plate resulting in both folding and volcanism.
The Alps are another example, created by the collision between the African and Eurasian plates. Over time, due to processes such as weathering and erosion, these mountains will slowly erode back to base level. The height of a mountain belt can give us clues about its age with higher elevations typically being younger than those with lower elevations because they have had less time to erode.