A baseball pitcher throws a fastball to a batter:

Potential energy increases, kinetic energy decreases.

Kinetic energy increases, potential energy decrease

The answer is

Kinetic energy increases, potential energy decrease

Explanation:

According to the principle of conservation of energy, as the ball is thrown initially the potential energy possessed is highest, as the ball moves to the batter the potential energy reduces by converting to kinetic energy, hence kinetic energy increases.

The kinetic energy is the energy

Possessed by a body due to motion

While

Potential energy is the energy possessed by a body by virtue of it position.