Final answer:
In the NFPA Diamond, the white section denotes special hazards such as oxidizers, water reactivity, corrosiveness, and other unique risks associated with the chemical substance.
Step-by-step explanation:
The white area on the NFPA Diamond represents special hazards that are present with a particular substance. These can include whether the substance is an oxidizer, reacts dangerously with water, is corrosive, acid, alkali, a biological hazard, radioactive, among other special conditions. The system is designed to provide quick and clear information about the hazards of materials and is commonly used in laboratories and industrial settings. The correct answer to the question 'What does white represent in the NFPA Diamond?' is 4) Special Hazard.