The correct answer is option 4: Fold mountain. Fold mountains are formed when two tectonic plates collide, causing the Earth`s crust to buckle and fold. The Himalayan mountain range is a prime example of a fold mountain because it was formed as a result of the collision between the Indian and Eurasian tectonic plates. The immense pressure and force of this collision caused the rocks to fold and uplift, creating the towering peaks and steep slopes characteristic of the Himalayas. This process of folding also resulted in the formation of deep valleys and high plateaus within the mountain range. Therefore, the Himalayas are a classic example of a fold mountain range, showcasing the dynamic and transformative forces of plate tectonics.