Which is a characteristic of a chemical property?

Flammability is indeed a characteristic of a chemical property. Chemical properties describe a substance's ability to undergo chemical changes and transformations, which often result in the formation of new substances. Flammability refers to a material's ability to ignite and burn when exposed to a flame or high temperatures, indicating how that substance reacts when combined with oxygen. This property is crucial in assessing safety and risk in various environments.

In contrast, the other choices reflect physical properties. Color is a physical attribute that can be observed without changing the substance's chemical structure. Mass and volume also pertain to physical characteristics; mass measures how much matter is present in an object, while volume measures the space that an object occupies. These properties do not involve a change to the substance's chemical identity or its ability to participate in chemical reactions.