A. Physiscal properties
Explanation - A substance have both physical and chemical properties that defines their state and ability to react with substances. Physical properties are those properties that provides the information about the substance but does not change its composition whereas chemical properties are those properties that are seen while the chemical reaction is taking place and the composition of the substance also changes.
Few examples of chemical properties are - toxicity, heat of combustion etc and that of physical properties are - color, density, odor, meting and boiling point etc.