Final answer:
Oxidation is the process in which a substrate loses electrons. It can occur through the addition of oxygen or changes in bonding with oxygen. This reaction is part of an oxidation-reduction (redox) reaction.
Step-by-step explanation:
Oxidation refers to the process in which a substrate loses electrons. It can occur through the addition of oxygen to the compound or a change in the bonding with oxygen. When a substrate is oxidized, it undergoes a chemical reaction that results in the loss of one or more electrons. This reaction is part of an oxidation-reduction (redox) reaction, where one substance loses electrons (the oxidized substance) and another substance gains electrons (the reduced substance).