Which of the following best defines the concept of combustion in chemical reactions?

Combustion is best defined as a chemical reaction that involves a substance reacting with oxygen, leading to the release of energy in the form of heat and light. This process typically occurs rapidly and is characterized by flames, which is a visible representation of the release of energy. During combustion, fuels such as hydrocarbons react with oxygen, producing products like carbon dioxide and water. This definition encapsulates the fundamental aspects of combustion, making it clear that it is not merely an interaction or a static condition, but an active reaction that significantly alters the chemical composition of the reactants involved.