Final answer:
Arson investigators typically wear blue (Option 3) helmets as part of the NFPA 704 Hazard Identification System.
Step-by-step explanation:
Arson investigators wear blue helmets to distinguish themselves and signify their role in the field. The color is chosen for its visibility and recognition among emergency response teams. Blue helps identify these specialists amidst the chaos of a fire scene, aiding in coordination and communication among the various units involved. This specialized gear is essential not only for their safety but also to establish their authority and expertise in investigating the causes of fires. The distinctive color serves as a symbol of their specialized training, knowledge, and commitment to uncovering the truth behind suspicious fires.
Additionally, the blue helmets often feature specific markings or labels that further identify these investigators to ensure efficient collaboration with other responders while maintaining a secure perimeter and conducting meticulous examinations of the scene.
The correct answer is blue (Option 3).