When using a pulley system to lift a weight, the mechanical advantage allows you to lift the weight with less force, but you will need to pull the rope a greater distance compared to lifting the weight directly.
In this case, if you originally require a force of 400 newtons to lift the weight directly over a distance of 4 meters, when using the pulley, the force required will decrease. However, the distance you will need to pull the rope will increase.
Therefore, the correct response is:
The force decreases, while the distance increases.