Which process involves an electric current to drive a chemical reaction?

The process that involves an electric current to drive a chemical reaction is electrolysis. During electrolysis, a direct current is passed through an electrolyte solution, which prompts a chemical change that would not occur spontaneously. This technique is commonly used to decompose compounds into their elemental forms, such as the electrolysis of water into hydrogen and oxygen gases.

In contrast, conductivity refers to the ability of a substance to conduct electric current, but it does not involve a chemical reaction itself. Distillation is a physical separation process that relies on differences in boiling points to separate components of a mixture. Filtration is another physical separation method that uses a barrier to separate solids from liquids or gases, but it does not drive a chemical reaction. Thus, the unique role of electrolysis in chemically transforming substances with the aid of electricity establishes it as the correct answer in this context.