Final answer:
The marker with a white background, orange diamond, and black lettering is part of the NFPA 704 Hazard Identification System and indicates special hazards related to substances.
Step-by-step explanation:
The marker with a white background, orange diamond, and black lettering is part of the National Fire Protection Agency (NFPA) 704 Hazard Identification System. This system provides safety information about certain substances. The white diamond at the bottom of the marker indicates special hazards, such as if the substance is corrosive, acidic, alkaline, a biological hazard, radioactive, and more. It alerts people about potential dangers and hazards associated with the substance.