What mountain range was formed by the collision of the Eurasian and Indo-Australian plates?

The Himalayas were formed by the collision of the Eurasian and Indo-Australian tectonic plates around 50 million years ago. This geological event is significant because it illustrates the process of plate tectonics and how the Earth's surface is shaped over time. As these two massive plates pushed against each other, the intense pressure caused the land to buckle and fold, leading to the rise of the Himalayas, which are now among the tallest mountains in the world, including Mount Everest. This mountain range continues to grow today as the plates are still moving, highlighting the dynamic nature of our planet's crust.

The other mountain ranges listed were formed through different geological processes and at distinct locations involving other tectonic plates, which is why they are not the correct answer. The Rockies, for instance, were primarily formed by the subduction of the oceanic plates beneath the North American plate, while the Andes arose from the collision between the Nazca and South American plates. The Alps were primarily formed from the collision of the African and Eurasian plates.