Answer: The movement of the Earth's crust
Step-by-step explanation:
The movement of the earth's crust is responsible for the formation of the Himalayas. The Himalayas ranges and the Tibetan plateau is formed by the result of the collision between the Indian plate and the Eurasian plate which started 50 million years ago.
This leads to the movement of the earth's crust which aimed to the formation of the mountains.
The movement of the plates lead to the movement of the earth's crust which lead to the formation of Himalayan mountain.