How can metal shoring be adjusted?

Metal shoring is designed to provide structural support and stabilization during damage control operations, particularly in maritime situations. The correct choice pertains to the functionality of metal shoring, as these units can indeed be extended to fit various spaces and provide the required support. The extendable nature of metal shoring allows for adjustments in length, making them versatile for different situations where precise fit and stability are needed.

The adaptability of metal shoring is crucial in emergency scenarios. By being extendable, they can accommodate a range of configurations and load-bearing requirements, which is vital in maintaining structural integrity and safety during an incident.

In contrast, the other options do not accurately represent the characteristics or adjustments of metal shoring. For instance, while some types of shoring may be cut, this is not a standard method for adjustment and could compromise their integrity. Requiring special tools for adjustment would limit their usability in emergency situations, where speed and efficiency are critical. Finally, being fixed in size contradicts the primary function of shoring, which is to provide a flexible solution for varying conditions encountered in damage control. Thus, metal shoring's extendable feature is essential for effective use in diverse emergency situations.