Explanation:

To qualify as a biodiversity hotspot, a region must meet two strict criteria:
It must have at least 1,500 vascular plants as endemics — which is to say, it must have a high percentage of plant life found nowhere else on the planet. A hotspot, in other words, is irreplaceable.
It must have 30% or less of its original natural vegetation. In other words, it must be threatened.
Around the world, 36 areas qualify as hotspots. They represent just 2.4% of Earth’s land surface, but they support more than half of the world’s plant species as endemics — i.e., species found no place else — and nearly 43% of bird, mammal, reptile and amphibian species as endemics.

Biodiversity Hotspots in India
The Western Ghats and Sri Lanka. These hills are present along the western edge of peninsular India.
The Eastern Himalayas. This region comprises of Bhutan, Northeast India, and Southern, Central and Eastern Nepal.
Indo-Burma.
Sundaland