Concept:Volcanic mountains form when magma from inside the Earth erupts and builds up on the surface.
Explanation:Kilimanjaro is a dormant volcano in Tanzania and Africa's tallest mountain.
It once had three volcanic cones: Kibo, Shira, and Mawenzi.
Its height is about 5,895 metres.
The mountain is protected within Kilimanjaro National Park, a UNESCO World Heritage site since 1987.
The other options are not volcanic mountains.
Aravali is a fold mountain range in northwestern India with its highest peak at Guru Shikhar (1,722 m).
Appalachian is a fold mountain system in eastern North America known for the Great Appalachian Valley.
Ural is a fold mountain range in Russia, rich in minerals like oil, coal, and metals, and marks the border between Europe and Asia.
Only Kilimanjaro is formed by volcanic activity.
Answer:D. Kilimanjaro