Answer : The correct option is, Chemical change.
Explanation :
Physical change : It is a change in which there is no new compound or substance is formed. In this, changes occurs only in the phase. This change is reversible in nature.
For example : Water boiled : It is a physical change because in this process only phase changes from liquid state to gaseous state.
Chemical change : It is a change in which a new or different compound or substance is formed and releases some amount of energy. There is no changes occurs in the phase. This change is irreversible in nature.
For example : Marshmallows browned : It is a chemical change due to the burning of sugar. In the sugar burning process, sugar react with oxygen to give carbon dioxide and water as a product.
As per question, when the substances are different from the starting substances, chemical change has occurred.
Hence, the correct option is, Chemical change.