Question

which option is an example of a physical property?
ph
toxicity
flammability
freezing point

Explanation:

Physical properties can be observed or measured without changing the substance's chemical identity. pH measures acidity/basicity and involves chemical reactions, toxicity and flammability are chemical properties related to reactivity. Freezing - point is the temperature at which a substance changes from liquid to solid without altering its chemical composition.

Answer:

freezing point