Answer:
Chemical energy to thermal energy
Step-by-step explanation:
The change of energy from one form of energy to another is called energy transformation. There are many forms of energy and the energy can be transferred from one form to another in the form of heat, light, sound etc.
In this case, something is burning. While burning, only chemical reaction occurs. There chemical energy is converted to thermal and radiant energy. It produces heat and light.
Hence, the correct option is (c) " chemical energy to thermal energy ".