Youngest Mountains: Himalayas
The youngest mountains among the options provided are the Himalayas. Let's delve into why the Himalayas are considered the youngest mountains.

Formation of the Himalayas
- The Himalayas were formed due to the collision of the Indian Plate with the Eurasian Plate. This collision began around 50 million years ago and is still ongoing, leading to the continuous uplift of the Himalayan mountain range.
- The process of mountain building in the Himalayas is known as tectonic plate collision, where the two plates converge and push against each other, causing the land to rise and form mountains.

Characteristics of the Himalayas
- The Himalayas are known for their towering peaks, including Mount Everest, the highest point on Earth.
- These mountains are geologically young, with their formation still in progress. The constant tectonic activity in the region results in earthquakes and landslides.
- The Himalayas are home to diverse ecosystems, including alpine meadows, temperate forests, and snow-capped peaks.

Comparison with Other Mountain Ranges
- The Western Ghats, Eastern Ghats, and Vindhayas are older mountain ranges compared to the Himalayas. They were formed millions of years ago and have undergone significant erosion over time.
- While all these mountain ranges have played a crucial role in shaping the geography and climate of the Indian subcontinent, the Himalayas stand out as the youngest and most dynamic among them.
In conclusion, the Himalayas are considered the youngest mountains among the options provided due to their ongoing formation as a result of tectonic plate collision. Their towering peaks, geological youth, and diverse ecosystems make them a unique and significant mountain range on Earth.