Roy throws a ball up in the air. Each time he throws the ball up in any direction, it falls back to the ground as shown in the illustration. The ball comes back to the ground because of the
Responses
A weak electric force of the earth.weak electric force of the earth.
B strong magnetic force of the earth.strong magnetic force of the earth.
C force of air resistance on the ball.force of air resistance on the ball.
D strong gravitational force of the earth.