What type of fire suppression system utilizes gas or chemical agents?

The choice highlighting a fire suppression system that uses gas or chemical agents is correct because such systems are designed to extinguish fires through chemical reactions rather than relying on water or foam. Common agents include carbon dioxide, halon, and other clean agents that effectively displace oxygen or interrupt the combustion process.

These gas or chemical suppression systems are often used in environments where water damage must be minimized, such as in areas with sensitive electronic equipment or in specialized industrial settings. Their ability to quickly reduce the temperature and suffocate the fire without introducing water makes them a valuable option for specific fire protection needs.

In contrast, the other options describe methods that do not fit the criteria of utilizing gas or chemical agents—water-based systems primarily rely on water, manual methods involve the use of handheld extinguishing tools, and foam-based systems create a protective layer of foam to suppress flames without gas or chemical agents.