Which type of train is typically utilized for shifting and managing track operations without revenue passengers?

The correct choice highlights the purpose of a deadhead train, which is primarily used for the repositioning of locomotives and crews without carrying revenue passengers. This type of train plays a crucial role in operational efficiency, as it allows rail companies to manage their resources effectively without impacting the flow of passenger services. Deadhead trains transport crew members back to their original or assigned locations after completing their shifts or moving locomotives that are not currently in service.

In contrast, extra trains are typically used in addition to regular scheduled services and may carry passengers or freight. Freight trains focus on transporting goods, while controlled blocks are related to signaling and controlling train movements on the tracks rather than operating trains for repositioning purposes. Understanding the specific roles of these different train types is essential for effective railway management and operations.