Which of the following belongs to the stacker driving device?

The correct answer, wheels, is essential to the stacker driving device because they facilitate movement and maneuverability of the stacker. In a fork truck or stacker, wheels are critical components that interact directly with the surface, allowing the vehicle to travel forward, backward, and perform turns. The design and type of wheels used can greatly influence the stacker's ability to navigate tight spaces and handle loads efficiently.

While diversion steering wheels, brake levers, and ignition devices are also important components of a stacker, they serve different purposes. The steering wheel, for instance, is used to control direction but does not physically engage the surface like wheels do. Brake levers are crucial for stopping and controlling speed but are not part of the driving mechanism responsible for movement. An ignition device is necessary for starting the engine of a motorized stacker but does not contribute to the driving function itself. The primary role of wheels, hence, makes them a fundamental part of the driving device in stackers, enabling propulsion and overall functionality.