Define the term "exothermic reaction" as it relates to fire.

The term "exothermic reaction" refers to a chemical process that releases energy in the form of heat. In the context of fire, this is particularly relevant because combustion is a quintessential example of an exothermic reaction. During combustion, fuel reacts with oxygen, and the reaction generates heat, causing the surrounding materials to combust. This release of heat is what makes fire visible and allows it to sustain itself as it can ignite nearby combustible materials.

Other options do not accurately describe the nature of an exothermic reaction. For instance, the concept of an energy-absorbing chemical reaction directly contradicts the definition of exothermic, as it would imply the absorption of energy rather than its release. Referring to processes of extinguishing flames or slow combustion does not capture the fundamental characteristic of an exothermic reaction, which emphasizes the heat release aspect during combustion. Therefore, recognizing "a reaction that releases heat and is characteristic of combustion" as the correct answer aligns perfectly with the definition of an exothermic reaction in the context of fire.