In a corrosion cell, the function of the electrolyte is to:

The function of the electrolyte in a corrosion cell is critical for facilitating ionic movement between the anode and cathode. An electrolyte is typically a solution that contains ions capable of conducting electricity. In a corrosion process, when metals are exposed to an electrolyte (such as saltwater), it creates an environment where ions can move freely.

This movement of ions is essential because it completes the electrochemical circuit necessary for corrosion to occur. At the anode, metal atoms oxidize and release electrons, which then travel through the metal to the cathode. For the circuit to be balanced, ions must migrate through the electrolyte to the anode and cathode, allowing the electrochemical reactions to proceed.

Other options presented do not accurately describe the role of the electrolyte in this context. Insulation between metals is contrary to the purpose of an electrolyte, as it would inhibit the flow of current necessary for corrosion. Conducting electrons is a function of the metal itself, not the electrolyte. Lastly, while the presence of an electrolyte can influence the corrosion rate, it is not the primary function of the electrolyte in the corrosion cell.