Which method uses electricity as a treatment against zebra mussels?

The method that uses electricity as a treatment against zebra mussels is electrical shock. This approach involves the application of an electrical current to the water or surfaces where zebra mussels reside. The electric shock disrupts the nervous system of the mussels, leading to their incapacitation or death. This method is particularly effective in controlling populations of zebra mussels, which can be highly invasive and detrimental to aquatic ecosystems and infrastructure.

On the other hand, thermal treatment involves using heat to kill or manage the mussel populations, and chemical induction typically refers to the application of aquatic herbicides or pesticides, which are not the same as using electricity. Ultrasonic cleaning utilizes sound waves to disturb or eliminate mussels but does not involve electrical currents in the same way as electrical shock does. Therefore, the use of electricity specifically characterizes the electrical shock method as the correct answer regarding zebra mussel treatment.