Final answer:
The NFPA symbol is a diamond with four colored sections indicating different hazards: red for flammability, blue for health, yellow for reactivity, and white for special hazards, each rated on a scale from 0 to 4.
Step-by-step explanation:
The symbol for the National Fire Protection Association (NFPA) is known as the NFPA 704 Hazard Identification System or the NFPA hazard diamond. The emblem is formed like a diamond and has four separate diamonds, each of which represents a different kind of hazard and is colored differently.
The top red diamond indicates flammability, the left blue diamond signifies a health hazard, the right yellow diamond shows reactivity, and the bottom white diamond denotes special hazards. Each hazard is rated on a scale from 0 (no hazard) to 4 (extremely hazardous).