The famous wildlife sanctuary known for protecting the endangered Nilgiri Tahr and harboring tropical shola-grassland ecosystems in Kerala is:

💡 Solution & Explanation

Eravikulam National Park, located in the high ranges of the Idukki district, is internationally renowned as the primary natural habitat of the endangered mountain ungulate Nilgiri Tahr and features expansive high-altitude shola-grassland complexes. Periyar is famous for Asian elephants and tigers, while Wayanad is part of the Nilgiri Biosphere Reserve northern tract. Shola forests are unique stunted montane evergreen woods interspersed with rolling grasslands.