Which of the following is NOT a type of containment?

Containment in fire safety is essential for preventing the spread of fire and smoke within a building. There are several recognized types of containment, including active, passive, and detection measures.

Active containment refers to systems designed to directly combat fire spread, often involving mechanical systems such as sprinklers or smoke control systems that can actively suppress fire. Passive containment, on the other hand, encompasses structural elements like firewalls, fire doors, and other built-in features that protect against the spread of fire without any moving parts or active intervention.

Detection systems are critical for identifying the presence of fire, smoke, or hazardous conditions, and while they are integral to fire safety, they do not fall under the traditional umbrella of containment strategies. Instead, they serve as a means of alerting building occupants and fire services, enabling a rapid response to potential threats. Therefore, the identification of containment strategies specifically points to mechanisms that stop the fire from spreading rather than those that detect it.

The term "reactive" implies a response to an incident rather than a preventive or containment strategy, aligning it with actions taken after a fire has already begun rather than preventing its spread, which further supports the conclusion that this option is not categorized as a type of containment.