Explanation:

Mount Kilimanjaro is a dormant volcano in Tanzania. It has three volcanic cones: Kibo, Mawenzi and Shira. It is the highest mountain in Africa and the highest single free-standing mountain in the world: 5,895 metres above sea level and about 4,900 metres above its plateau base.

Aconcagua is a mountain in the Principal Cordillera of the Andes mountain range, in Mendoza Province, Argentina. It is the highest mountain in the Americas, the highest outside Asia, and the highest in both the Southern and the Western Hemispheres with a summit elevation of 6,961 metres.

Denali (also known as Mount McKinley, its former official name) is the highest mountain peak in North America, with a summit elevation of 20,310m.

Chimborazo is a currently inactive stratovolcano in the Cordillera Occidental range of the Andes. Its last known eruption is believed to have occurred around 550 A.D.