What does NFPA stand for, which provides standards for gas installations?

The correct answer is that NFPA stands for the National Fire Protection Association. This organization is instrumental in developing and publishing codes and standards to minimize the risk of fire and ensure safety in various industries, including those involving gas installations. The NFPA's standards provide guidelines on safe practices, equipment, and installation techniques for gas systems, which are vital to protecting lives and property.

The other options refer to different organizations that do not focus on gas installations or fire safety. For instance, the National Fluid Power Association pertains to fluid power technology, while the National Facilities Planning Association deals with aspects of facilities planning. The National Fire Prevention Association does not exist; the correct name is the National Fire Protection Association. Thus, the emphasis of the NFPA on fire safety and its specific standards for gas installations make it the relevant organization in this context.