Bharatanatyam is a classical Indian dance form that originated in Tamil Nadu. One of five major dance styles corresponding to each of the elements, Bharatanatyam represents the mystic manifestation of fire in the human body. The movements of Bharatanatyam dancers resemble a dancing flame, while their expressive hand gestures communicate specific meanings. Rooted in Hindu tradition, the dance form has since crossed religious boundaries and is now studied by members of what other religions? Discuss