Detailed Explanation:

Answer: Option 1 — Kanha National Park

Kanha National Park in Madhya Pradesh is renowned for the conservation of the hard ground barasingha (Southern swamp deer), a unique subspecies of the Indian swamp deer that thrives on hard ground in open sal forests and feeds exclusively on grasses (graminivorous). Conservation efforts by the park have successfully revived this subspecies from near extinction, making it a flagship conservation success story.

📝 Short Notes: Barasingha and Its Conservation

• Barasingha (Rucervus duvaucelii): Also known as the swamp deer, it is a herbivorous species native to the Indian subcontinent, classified as Vulnerable by IUCN.
• Three Subspecies: Northern swamp deer (found in Uttar Pradesh terai), Western swamp deer (found in Nepal), and Southern/hard ground swamp deer (found in central India).
• Hard Ground Barasingha: This subspecies is adapted to hard ground in dry deciduous sal forests, unlike other swamp deer that prefer marshy wetlands.
• Kanha National Park: Located in Madhya Pradesh, it is the primary habitat for hard ground barasingha and has achieved remarkable conservation success since the 1970s.
• Diet: Exclusively graminivorous (grass-eating), feeding on various species of grasses found in forest clearings.
• Other Populations: Northern swamp deer are found in Dudhwa National Park; Manas has the Western subspecies but focuses on other wildlife.