A simple fixed pulley makes a job easier primarily by changing the direction at which the force needs to be applied.
In a fixed pulley system, the pulley allows you to pull down on the rope to lift an object upwards. This change in direction can make it easier to lift heavy objects, as you can use your body weight to assist in the lifting process. However, the mechanical advantage from a simple fixed pulley doesn't reduce the amount of work done, as work is defined as force times distance (the same work is done whether you pull down or lift up).
So, the correct response is primarily about changing the direction of the applied force.