Answer
Oxidation occurs when a reactant loses electrons during the reaction. Reduction occurs when a reactant gains electrons during the reaction.
Oxidation occurs at the anode and reduction occurs at the cathode.
Step-by-step explanation
Both oxidation and reduction are complementary reactions.
Oxidation and reduction reactions are two types of electrochemical reactions. An electrochemical reaction involves the transfer of electrons between two chemical compounds. In oxidation reactions, there is a loss of electrons, and in reduction reactions, there is a gain of electrons.
The reaction at the anode is oxidation and that at the cathode is reduction. The electrons are supplied by the species getting oxidized.