Final answer:
True, galvanic action occurs because of the difference in electrical potential between the two metals causing a flow of electrons from the anode to the cathode. This flow of electrons can be harnessed to perform work.
Step-by-step explanation:
True, galvanic action occurs because the difference in electrical potential between the two metals will always cause the flow of electrons from the anode to the cathode when there is an electrolyte to facilitate this flow. In a galvanic cell, current is produced when electrons flow externally through the circuit from the anode to the cathode due to a difference in potential energy between the two electrodes. For example, in a Zn/Cu galvanic cell, zinc acts as the anode and copper acts as the cathode. The valence electrons in zinc have a higher potential energy compared to copper, causing electrons to flow spontaneously from zinc to copper ions. This flow of electrons can be harnessed to perform work, similar to water flowing downhill and turning a waterwheel.