Burning of candle is 

A chemical change is one in which the chemical composition of the substance changes and a new substance is formed as a result of a reaction.

On the other hand, in a physical change, only the physical state of the substance changes like temperature, phase, and pressure. The compound remains the same during this change.

The burning of a candle can both be a physical and a chemical change.

On heating, candle wax melts and forms liquid wax which reconverts into solid wax, this comes under a physical change.

Burning a candle is a chemical change because water vapor, heat, and light are released as a result of the candle burning. 

Furthermore, the change is irreversible, as the original substance cannot be recovered by any means. The loss or gain of energy and the irreversible nature of the reaction are characteristics of a chemical change. 

Therefore, the burning of a candle is actually considered a chemical change.

Hence, the correct option is (C).