The correct answer is (a) Western Ghats.
The Western Ghats are a mountain range in India that runs parallel to the Arabian Sea coast. They are a UNESCO World Heritage Site and are home to a wide variety of plants and animals. The Western Ghats are also an important source of water for the Indian subcontinent.
Kaziranga National Park is a national park in Assam, India. It is a UNESCO World Heritage Site and is home to the world’s largest population of one-horned rhinoceroses.
Manas National Park is a national park in Assam, India. It is a UNESCO World Heritage Site and is home to a variety of wildlife, including tigers, elephants, and rhinoceroses.
Sundarbans National Park is a national park in Bangladesh and India. It is a UNESCO World Heritage Site and is the largest mangrove forest in the world.
The Western Ghats are the correct answer because they are a UNESCO World Heritage Site that protects a significant portion of the Western Ghats biodiversity. The other options are national parks that are home to a variety of wildlife, but they do not protect a significant portion of the Western Ghats biodiversity.