Final answer:
The list that includes only physical properties is the one containing boiling point, conductivity, and color, since physical properties can be observed without changing the substance's composition.
Step-by-step explanation:
The question is asking for a list of properties that are exclusively physical properties of a substance. According to the information provided, physical properties can be measured or observed without changing the composition of the substance. Examples of physical properties are color, boiling point, and density. On the other hand, chemical properties involve the substance's ability to undergo a chemical change, such as flammability and reactivity. Therefore, the list that includes only physical properties is the one containing boiling point, conductivity, and color. Flammability and reactivity are chemical properties, not physical ones.