To increase the acceleration of the ball, the bowler should throw the ball with more force. According to Newton's second law of motion (F = ma), acceleration (a) is directly proportional to the net force (F) acting on an object and inversely proportional to its mass (m). So, if the mass of the ball remains constant, applying more force will increase the acceleration.
Therefore, the correct response is: The bowler should choose a ball with less mass or throw the ball with more force.