The correct answer is (a) Eastern Ghat, Western Ghat.
The Eastern Ghats and Western Ghats are mountain ranges that run parallel to the east and west coasts of India, respectively. They are important biodiversity hotspots, containing a wide variety of plant and animal species. The Eastern Ghats are home to the Eastern Ghats Biosphere Reserve, which is a UNESCO World Heritage Site. The Western Ghats are home to the Western Ghats Biosphere Reserve, which is also a UNESCO World Heritage Site.
The Vindhyan Range is a mountain range that runs through central India. It is not a biodiversity hotspot. The Shivalik Range is a mountain range that runs along the foothills of the Himalayas. It is not a biodiversity hotspot.
The Eastern Ghat and Western Ghat are important for a number of reasons. They provide a home for a wide variety of plant and animal species. They also help to regulate the climate and provide a source of water for millions of people. The Eastern Ghat and Western Ghat are also important for tourism.
The Eastern Ghat and Western Ghat are facing a number of threats, including deforestation, mining, and pollution. These threats are putting the biodiversity of the Eastern Ghat and Western Ghat at risk. It is important to protect the Eastern Ghat and Western Ghat so that they can continue to provide a home for a wide variety of plant and animal species and help to regulate the climate.