The highest mountains in Africa, which is not part of any mountains chain, is

Mount Aconcagua
Mount Kilimanjaro
Mount Kosciusco
Mount Blanc

The correct answer is Mount Kilimanjaro.

Mount Kilimanjaro is a dormant volcano in Tanzania. It is the highest mountain in Africa, standing at 5,895 meters (19,341 feet) above sea level. It is also the highest free-standing mountain in the world, meaning that it is not part of a mountain range.

Mount Kilimanjaro is a stratovolcano, which means that it is made up of layers of lava, ash, and cinders. The volcano is thought to have formed about 750,000 years ago.

Mount Kilimanjaro is home to three main peaks: Kibo, Mawenzi, and Shira. Kibo is the highest peak and is the only one that is still active. Mawenzi and Shira are extinct volcanoes.

Mount Kilimanjaro is a popular tourist destination. The mountain is home to a variety of plant and animal life, including elephants, giraffes, and zebras. The mountain is also home to a number of different ecosystems, including rainforest, savanna, and alpine desert.

Mount Kilimanjaro is facing a number of threats, including climate change, deforestation, and overtourism. Climate change is causing the snow and ice on the mountain to melt, which is leading to the loss of habitat for many of the mountain’s plants and animals. Deforestation is also a major threat to the mountain. Trees help to regulate the climate and provide habitat for many of the mountain’s plants and animals. Overtourism is also a problem, as it can lead to pollution and damage to the mountain’s ecosystem.

Despite the threats it faces, Mount Kilimanjaro remains a popular tourist destination and a symbol of Africa.