An oxidation-reduction reaction, often called a redox reaction, involves the transfer of electrons between two substances. In this process, one substance loses electrons and undergoes oxidation, while another gains electrons and undergoes reduction. This exchange of electrons is fundamental in various chemical processes, including combustion and respiration. These reactions are essential in many biological and industrial applications. For example, in cellular respiration, cells convert glucose into energy through redox reactions. Similarly, in batteries, chemical energy is transformed into electrical energy via oxidation-reduction processes, powering devices we use daily.