EARTH REVOLVES AROUND THE SUN. WHY ?

Why do earth revolve around the sun?

Earth and many other celestial bodies revolves around the sun ,but have you thought WHY???
It can be said that it is the reaction of the earth against sun's gravitational force preventing it from falling into the massive sun.It can be said as the earth's method to resist the intense gravitational force of the sun  by increasing  it's velocity and there by increasing the centrifugal force acting and keeping it in an equilibrium.

It can be explained with the help of General relativity.Sun is a massive body and so it bends the space time.Earth is like a ball falling into a funnel , the funnel here is bended space-time.Like the ball,earth falls down the funnel(bended space-time) eventually causing this revolutionary motion.

You don't want to fear that the earth will fall into the sun .Before the sun will already swallow the earth because of it's transition into a red giant.