Which of the following characteristic is true about the process of burning?

Burning is a chemical change.

The correct answer is option 2. Burning is a chemical change.

The process of burning involves a chemical reaction, typically with oxygen, where the original substances undergo a transformation at the molecular level, resulting in the formation of new substances. This change in chemical composition distinguishes burning as a chemical change. It is not a physical change, as in physical changes, the substances retain their original chemical composition despite changes in state or appearance.