Why do we need Gravity

Gravity is most important for human being. Without gravity we cannot survive. Everything in the universe are moved is stable orbit. If the gravity decreased by one percent, the world can be destroyed. but if the gravity increased by five percent So everything on earth will become heavier and temperature also increased. Because due to the increased of gravity earth will be near the sun. Earths structure will break due to rising temperature. 

                                                    Why do we depend on Gravity?

Issac Newton discovered gravity  in 1687. Our food is also depend on gravity. If gravity increases, our food will harden and become inedible. The fish will come out of the water and will not able to survive.