Redox reactions, short for reduction-oxidation reactions, involve the transfer of electrons between two substances. In these reactions, one substance loses electrons and is oxidized, while another gains electrons and is reduced. This electron transfer is essential in various chemical processes, including combustion and respiration. These reactions are crucial in many biological and industrial applications. For example, in cellular respiration, glucose is oxidized to produce energy, while in batteries, chemical energy is converted to electrical energy through redox processes. Understanding redox reactions helps explain how energy is transferred and transformed in different systems.