What is the process involving fuel and oxygen in fire?

• A. Chemical reaction
• B. Combustion
• C. Physical change
• D. Heat transfer

Answer: (A)

Combustion is the process of burning fuel in the presence of an oxidizer, typically oxygen, which releases heat and often light. This is the specific sequence that defines fire: a fuel reacts chemically with oxygen, producing energy and new products such as carbon dioxide and water. While combustion is indeed a chemical reaction, the question is asking for the name of the process itself—combustion—rather than the broader category of all chemical reactions.

Understanding why this fits best helps: physical changes involve altering form without changing chemical identity, which isn’t what happens in burning. Heat transfer describes how energy moves, not the actual chemical event of burning. And while burning is a chemical reaction, that term is too general for the question’s focus on the specific process occurring in fire.