Nepal is the country with the tallest mountain peak. Mount Everest is the highest mountain on Earth with about 8,848 metres of height. This mountain is in the Himalayas in South Asia- the highest range of mountain in the world. The word Himalaya means "House of Snow". The mount Everest is above the death zone (there is not enough oxygen), so climbers use extra oxygen.
The more carbon dioxide, the more the atmosphere warms up due to the greenhouse effect. Greenhouse effect- greenhouse gases trap the suns heat making the earth warmer
Calderas are depressions in the earth that have been made after a volcano erupts and then collapses. While Mountains could be an answer but Calderas makes more sence
