Which statement is correct for a chemical change?

Correct answer: A new substance can form

The direct answer is option A. A chemical change produces one or more substances whose composition or properties differ from the starting material. Examples include burning, rusting and digestion. Option A is correct because formation of a new substance is the central sign of chemical change. Option B describes only a change of position, which is physical and does not create a new substance. Option C describes a change involving the container, not necessarily the material inside it. Option D is false because chemical changes can involve energy being released or absorbed, although energy change alone is not the only test. Thus new substance formation is the strongest clue. Memory cue: ask whether the material has become a different substance.