Which of the following best describes the function of electrodes in an electrochemical cell?

The function of electrodes in an electrochemical cell is best described by the option that states they react with the electrolyte to produce a charge difference.

Electrodes are essential components of electrochemical cells and are typically made of conductive materials, such as metals. In the process of electrochemical reactions, the anode and cathode serve specific purposes. At the anode, oxidation occurs, where electrons are released, resulting in a buildup of positive charge. Conversely, at the cathode, reduction takes place, where electrons are accepted, leading to a buildup of negative charge. This movement of electrons between the electrodes through the external circuit leads to the generation of an electric current. Therefore, the reaction between the electrodes and the electrolyte is fundamental in establishing the charge separation that allows the electrochemical cell to function effectively.

The other descriptions do not accurately capture the role of electrodes: electrodes do not serve to increase the temperature of the electrolyte, nor do they store electricity themselves; rather, they facilitate the transfer of charge. Lastly, electrodes are not insulators; they must conduct electricity to enable the flow of charge, which is critical for the operation of the electrochemical cell.