A GHS label is any written, printed, or _______ material displayed on or affixed to containers of _______ chemicals.

The correct choice emphasizes that a GHS (Globally Harmonized System) label can include written, printed, or graphic material, which are essential components for communicating hazards effectively. GHS labels are specifically designed to provide information about hazardous chemicals, ensuring that users can identify and understand the risks associated with these substances.

Choosing "graphic" aligns with the fact that GHS labels often incorporate symbols and pictograms to convey hazard information quickly and visually, making it easier for individuals to recognize potential dangers. The focus on hazardous chemicals is crucial, as GHS labeling regulations are specifically intended to enhance safety in workplaces where such chemicals are handled.

The other options diverge from the core purpose of the GHS labeling system. Terms like "non-hazardous," "safe," and "normal" do not pertain to the primary intent of GHS labels, which is to communicate hazards associated with chemicals that can pose risks to health and safety. Additionally, "digital" and "verbal" do not fit the conventional formats recognized in GHS regulations, which predominantly focus on visual components for clarity and immediate recognition of hazards.