The reason why Mount Everest has such a deep root is because it is located on the boundary between the Indian and Eurasian tectonic plates. These two plates are constantly moving towards each other, and the collision between them has caused the Himalayas to rise up. As the Himalayas have risen, Mount Everest has also been pushed up, and its roots have been driven deep into the Earth's crust.
Mount Everest's deep root is important because it helps to support the mountain's massive weight. The weight of Mount Everest is estimated to be about 100 trillion kilograms, and this weight would cause the mountain to collapse if it did not have a strong root.
The root of Mount Everest is also important because it is home to a variety of plants and animals. These plants and animals have adapted to the unique environment of the mountain's root, and they play an important role in the ecosystem of the Himalayas.
Mount Everest's deep root is a fascinating feature of this iconic mountain. It is a testament to the power of plate tectonics and the forces that have shaped the Earth over millions of years.