Southern swamp deer/ hard ground swamp deer, a unique sub-species of Barasingha, also known as the Indian swamp deer, is a herbivorous species that feeds exclusively on grasses (graminivorous) and is well adapted to is adapted to hard ground in open sal forest. Kanha National Park is well-known for the conservation of hard ground swamp deer. Conservation efforts by the park have helped revive its numbers from near extinction. Therefore, the correct answer is Kanha National Park.