Gravity is a downward force caused by the gigantic mass of the Earth and the mass of the ball.
(Gravity; is; a downward force caused by the gigantic mass of the Earth and the mass of the ball) (a downward force; caused; by the gigantic mass of the Earth and the mass of the ball)
Gravity a downward force
is caused
a downward force caused by the gigantic mass of the Earth and the mass of the ball
by the gigantic mass of the Earth and the mass of the ball