The Himalayan mountain range and Tibetan plateau are the result of a 50 million-year-old collision between the Indian and Eurasian plates, which is still ongoing.
225 million years ago (Mya), India was a large island off the coast of Australia, separated from Asia by the Tethys Ocean.
Final answer:
Hence, the Himalayas are formed by the collision between the Indian Plate and the Eurasian Plate.