Read the following passage and answer the questions that follow.

T'ai chi is a Chinese martial art and a form of stylised, meditative exercise consisting of slow circular and stretching movements and positions of bodily balance.

When a lot of people got sick owing to population explosion and lack of sufficient medical care, in 1956, during the communist revolution, top t'ai chi practitioners in China got together and came up with a short programme of teaching t'ai chi at a national level. The healthy practice of ending the day with some t'ai chi instead of remaining glued to the TV set or mobile phone would not only melt away the aches and pains acquired during the day but also induce a truly restful sleep.

T'ai chi's social benefits are well documented. The technique - Push Hands, where two people pair off- one uses his hands to push the partner, and the partner yields and neutralises the first and maintains his equilibrium has been shown to have psychological value. It has tremendous healing effect on those suffering from loneliness. All moves in t'ai chi involve bending and stretching. It starts with opening and closing in the joints. The joints get smaller while closing and expand while opening. At the physical level, this raises the practitioner's vitality. T'ai chi unites the mind, body and heart exponentially.

According to t'ai chi classics, the lower dantian - the area between the navel and the pubic bone is the energetic centre that affects every action you make. It is the body's main switch box. A part of your mind should always remain present in your lower dantian. If everything comes from your lower dantian, it floods all the energy channels of your body evenly and balances them. The increased energy in the lower dantian increases your sense of physicality in everything you do, be it health, power, strength or focus.