Which of the following is an application of a thermal system?

A thermal system is primarily concerned with the transfer and management of heat energy. In this context, food preservation stands out as a significant application of thermal systems.

Food preservation utilizes thermal methods such as refrigeration, pasteurization, and canning to inhibit the growth of bacteria and other microorganisms that can spoil food. By controlling temperature, either by lowering it to slow microbial activity or by applying heat to kill bacteria, thermal systems play a crucial role in extending the shelf life of food products while maintaining quality and safety.

While energy conversion can be associated with thermal systems, as in heat engines, it doesn't directly align with the specific application of managing food. Data storage focuses more on techniques involving electrical signals and magnetic materials rather than thermal processes. Although mechanical movement may involve thermal principles (for instance, in certain engines), it is not a primary application of thermal systems in the context provided.