Answer:
I help you with the definition so that you can answer the question that is given to you.
Explanation:
Solid: Has a definite shape and volume.
Liquid: Has a definite volume, but take the shape of the container.
Gas: Has no definite shape or volume.
Change of state: When matter is converted from one of the three states (example: solid, liquid, or gas) to another state.
I hope the explanation of mine help you answer that question.
