Which term identifies health, flammability, and instability hazards?

• A. NFPA 704 label
• B. Target hazard
• C. Yellow section of NFPA 704
• D. Heat, fuel, and oxygen needed for combustion

Answer: (A)

The NFPA 704 labeling system communicates multiple hazard kinds for materials at a glance. Its diamond format uses blue for health, red for flammability, and yellow for instability (with numbers 0–4 to show severity), plus a white section for special hazards. This single label lets people quickly understand health, flammability, and instability hazards together, which is why it’s the term described. The other options don’t fit because a target hazard is a planning concept, the yellow section alone covers only instability, and the fire triangle (heat, fuel, oxygen) explains what’s needed for combustion, not how hazards are labeled.