Which one of the following is the continent with the highest mean elevation in the world?

1. The question asks which continent has the highest mean elevation in the world. 2. Mean elevation refers to the average height of the landmass above sea level. 3. Antarctica is largely covered by a massive ice sheet, averaging over 2,000 meters (or about 6,500 feet) in thickness. This thick ice sheet significantly raises its average surface elevation, making it the continent with the highest mean elevation. 4. Asia has the world's highest mountains (the Himalayas, including Mount Everest), but it also has vast low-lying plains and plateaus, resulting in a lower mean elevation than Antarctica. 5. North America and South America also have significant mountain ranges but vast plains and lower areas, leading to lower mean elevations compared to Antarctica.