What does NFPA 10 pertain to?

The correct answer pertains to the NFPA 10, which establishes requirements for the installation, maintenance, and inspection of portable fire extinguishers. This standard ensures that portable extinguishers are readily available and in proper working condition to effectively combat small fires and enhance safety in both residential and commercial environments. By outlining the minimum requirements for various types of extinguishers and their respective classifications based on the kind of fire they are intended to suppress, NFPA 10 plays a crucial role in fire safety practices.

The other options relate to different aspects of fire safety and emergency response. A standard for fire investigations would guide the procedures and methods used by fire investigators to determine the cause and origin of fires, while standards for emergency response vehicles and protective clothing focus on the specifications and safety requirements for equipment and gear used by fire and rescue personnel. Each of these options addresses important components of fire safety but does not specifically target the use and maintenance of portable fire extinguishers as NFPA 10 does.