What happens at the anode during electrolysis?

During electrolysis, the anode is defined as the electrode where oxidation takes place. This process involves the loss of electrons from ions or molecules. When a substance loses electrons, it means that it is undergoing oxidation. Therefore, at the anode, electrons are lost, which aligns with the correct answer.

In contrast, if reduction were to occur, it would take place at the cathode, where electrons are gained by the ions. This distinction is crucial in understanding the overall process of electrolysis, as it clarifies the roles of the anode and cathode.