Here's why:

* Convergent Plate Boundary: This is where two tectonic plates move towards each other.

* Continental-Continental Collision: When two continental plates collide, they have similar densities, so neither plate is subducted (forced under the other). Instead, the immense pressure causes the land to buckle, fold, and uplift, forming mountain ranges like the Himalayas.

In the case of the Himalayas, the Indian Plate is moving northward and colliding with the Eurasian Plate. This collision has been happening for millions of years, and it's still ongoing, which is why the Himalayas continue to rise.