Answer: C a substance changes state from solid to liquid
Step-by-step explanation:
A physical change is one that occurs when the substance in question changes its form. This is usually in terms of its state of matter. In the case of a substance changing state from solid to liquid, this is most definitely a physical change.
For instance, when water freezes and goes from liquid to ice, this is a physical change as the water is not the same state it originally was.