Which of the following is a chemical change?

Burning wood is a chemical change because it involves a reaction between the wood and oxygen from the air, producing new substances, such as ash, carbon dioxide (CO2), and water vapor (H2O). Chemical changes, unlike physical changes, result in the formation of entirely new substances and are often irreversible. Burning wood cannot be undone to return it to its original state. In contrast, physical changes, such as melting ice or boiling water, do not alter the chemical structure of the substance. Understanding chemical changes is vital in understanding the processes that drive chemical reactions in nature and industry.