What is produced during a combustion reaction?

In a combustion reaction, the primary characteristic is the rapid reaction of a fuel, typically a hydrocarbon, with oxygen. This process results in the release of energy in the form of light and heat. The combustion of hydrocarbons primarily produces carbon dioxide and water as byproducts, but the notable aspect of the reaction is the energy release, which is what makes combustion an essential process for various applications, such as in engines and heating.

The other options do not accurately reflect the fundamental outcome of combustion reactions. While solid waste, liquid byproducts, or other gases may sometimes be observed in specific scenarios, such as in incomplete combustion or the burning of certain materials, the definitive and consistent result of combustion is the production of energy, making that the correct focus for the question.