The convergence of tectonic plates, forming a mountain range.
Explanation:
On the diagram, we can see the Eurasian plate and Indian plate, as well as the movement of the Indian plate over time relative to the Eurasian plate. The Indian plate has been moving over the course of millions of years from the southern hemisphere toward the northern hemisphere and has eventually hit the Eurasian plate. The two plates have collided and formed a convergent plate boundary.
The convergence occurs between continental crusts. With the crust constantly creating an enormous amount of pressure along the plate boundary, the crust in this part has started to bend and lift up, gradually creating a mountain range. The mountain range that has formed here is actually the highest and most massive mountain range in the world, the Himalayas.
