Answer: B
Explanation: When a football is thrown into the air, the force that propel it to move towards a direction is the "Applied Force". Also, when the ball is moving, it will reach a peak in the air, relative to the applied force and direction, and begin to come down. The ball is being acted upon by a "Gravitational Force", therefore obeys gravity.
Option B, which is "Applied and gravitational forces", is the correct answer.