From the moment man opens his eyes to this world a great order surrounds him. He needs oxygen to survive. It is interesting that the atmosphere of the planet on which he lives provides more than just the adequate amount of oxygen he needs. This way, he breathes without difficulty. For the existence of life on this planet, the existence of a source of heat is essential. In response to this need, the sun is located just at the right distance to emit just the exact amount of heat and energy man needs. Man needs nourishment to survive. Every corner of the world abounds in astonishingly diversified provisions. Likewise, man needs water. Surprisingly, three fourths of the planet is covered with water. Man needs shelter, and in this world, there is land on which it is suitable to build and all sorts of materials to make shelters.