Which of the following is a common application of electrochemical cells?

Electroplating is a common application of electrochemical cells because it involves the use of an electrolytic cell to deposit a layer of metal onto a surface. This process uses electrical energy to drive a non-spontaneous reaction, enabling the attachment of a metallic coating to various objects, which can enhance their appearance, improve corrosion resistance, or increase conductivity. The electrochemical reaction taking place in electroplating allows for precise control over the thickness and quality of the metal layer applied, making it a widely utilized technology in various industries, from jewelry and automotive parts to electronics and manufacturing.

The other choices involve technologies that do not primarily operate based on electrochemical principles. Wind turbines convert mechanical energy into electrical energy, solar panels convert light energy into electrical energy through photovoltaic processes, and heating systems (such as furnaces and heat pumps) primarily rely on combustion or heat transfer mechanisms rather than electrochemical reactions. Thus, electroplating distinctly stands out as a relevant application of electrochemical cells.