The answer would be:
less weight and falls more slowly than on Earth. It undergoes the same acceleration as on Earth when exposed to the same force as on Earth.
Weight is dependent on the pull of gravity. Because the pull of the moon's gravity is 1/6th that of Earth then the weight of the balls would also be 1/6th on the moon. Acceleration would be also 1/6th so it means that it will fall more slowly. Earth has its own magnitude of gravity, so it will undergo the same acceleration.