Answer:
Option: physical properties can be measured or observed without changing the composition of the substance
Step-by-step explanation:
A physical property is a property that is constant and uniform. The property can be measured with the need to alter the material.
For example, temperature of water is the measure of the average kinetic energy of a substance. In other words, no property has changed.
Another good example is mass. Mass is the measure of the concentration of matter. Again this does not affect the composition of a substance.