Answer: Option (d) is the correct answer.
Explanation:
A change that does not bring any difference in chemical composition of a substance is known as a physical change.
For example, shape, size, density, mass etc are all physical changes.
Change in color is not necessarily a physical change because sometimes color of a substance changes due to chemical reaction.
For example, during rusting color of iron changes.
Whereas a change that brings difference in chemical composition of a substance is known as a chemical change.
For example, reactivity, release or absorption of energy, toxicity etc are all chemical changes.
Thus, we can conclude that the statement substance changed shape was a physical change.
