Final answer:
The Himalayan Mountains are formed by the collision of the Indian Plate with the Eurasian Plate, resulting in the highest mountain ranges in the world.
Step-by-step explanation:
The Himalayan Mountains are formed by the collision of the Indian Plate with the Eurasian Plate. This collision began about 70 million years ago and resulted in the highest mountain ranges in the world. The tectonic action between the plates causes the Himalayas to rise in elevation by as much as one to five millimeters per year.