Most people know yoga as a kind of exercise, which aims at developing strength and flexibility. However,     1    yoga is really about is more than just exercise. People do yoga     2     (hear) what their bodies are telling them as well as the quiet voice inside them. In 2014, the Prime Minister of India, Narendra Modi, asked the United Nations to create an International Day of Yoga. The United Nations agreed, and now International Yoga Day     3    (celebrate) in June.