Redox, short for reduction-oxidation reactions, is a branch of chemistry that focuses on the transfer of electrons between molecules. These reactions involve the change in oxidation states of atoms within the molecules, resulting in the loss or gain of electrons. Redox reactions play a crucial role in numerous biological processes, such as energy production in cells, metabolism, and cellular respiration. They are also important in environmental chemistry, as they can affect the behavior and fate of contaminants in the environment. Researchers in the field of redox study the mechanisms and applications of these reactions in various fields, including biology, medicine, environmental science, and industrial chemistry.