When I look at the birds flying in the sky. I always think they are very lucky as they are born free. They are free to move anywhere in the world without any restriction. They are lucky than human beings as we are not free to move from one country to another country. We have to follow many instructions for moving. They can change their place according to their need, when they feel very cold at some place, they move to the areas where they find warm weather. Similarly when they feel very hot at some place, they move to the areas, where