Here's how it works:

* Convergent Plate Boundaries: When two tectonic plates move towards each other, they collide. The denser plate (usually oceanic) will subduct (slide) beneath the less dense plate (usually continental).

* Folding and Uplift: The immense pressure of the collision causes the rock layers on the overriding plate to buckle and fold, creating mountains.

* Examples: The Himalayas, the Andes, and the Alps are all examples of mountain ranges formed by this process.

Let me know if you'd like more details about mountain formation!