Which of the following tasks is appropriate for a deluge sprinkler system?

A deluge sprinkler system is specifically designed for combating large-scale fires, making it highly effective in situations where there is an immediate need to control significant fire outbreaks. These systems utilize open sprinkler heads that allow water to discharge over a large area simultaneously, which is essential for suppressing flames and preventing fire from spreading. It is commonly found in high-risk areas such as storage facilities for flammable materials, aircraft hangars, and industrial plants.

In contrast, the other options relate to scenarios that are not suited for a deluge system. For instance, protecting against freezing typically requires different systems like antifreeze solutions and insulation rather than a deluge system, which is focused on delivering abundant water flow. Providing quick suppression for a minor leaking pipe would not warrant the extensive use of a deluge system, as other fire suppression methods such as localized sprinklers or portable extinguishers would be more efficient and appropriate. Controlling humidity is outside the purview of a deluge system, which does not regulate moisture levels but rather focuses on fire suppression through water discharge.