Which system involves one rope routed between pulleys where all moving pulleys operate at the same speed and direction as the load?

The correct answer is a Simple System. In a Simple System, the configuration involves a single loop of rope that runs between pulleys, where all pulleys move in unison with each other and in the same direction as the load being lifted or moved. This design allows for efficient transfer of force and motion to the load with a straightforward setup.

In contrast to the complexity of a Compound System, which may involve multiple ropes and pulleys creating mechanical advantage through different paths, the Simple System maintains a direct and uncomplicated relationship between the movement of the rope and the load. A Complex System might encompass a broad range of arrangements with various mechanical advantages and potential intricacies, while a Dynamic System suggests movement that can vary in speed and direction, which does not align with the characteristics of the Simple System where movement is uniform.