At lunch, the babysitter gives Tanya and Damien each a chocolate candy. Tanya puts her candy on her plate. Damien saves his candy in his pocket. After lunch, Damien discovers his candy has melted. Which statement accurately compares the atoms in the two candies?

Damien’s candy melted because it became warmer in his pocket than Tanya’s candy on her plate. When a substance gets warmer, its atoms gain thermal energy and vibrate faster. They are not unable to move, so choice C is incorrect; Damien’s atoms do not have less energy, so choice A is incorrect.

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