If a ball is accelerating down through the air with no horizontal motion, the correct statement about the net forces acting on the ball is:
The gravitational force is greater than the drag.
This is because the ball is accelerating downward, which implies that the net force acting on it must also be directed downward. Since drag is the force acting upward due to air resistance, for the ball to experience a downward acceleration, the force of gravity must be greater than the drag force.