A logic diagram can best be used to describe which of the following?

A logic diagram is specifically designed to represent the logical relationships and functions of control elements within a control system. It is particularly effective in illustrating the wiring and interconnections between individual instruments, as it clearly shows how sensors, controllers, actuators, and other components interact in a logical sequence. By detailing the connections and the operational flow between these components, a logic diagram provides valuable insights into how the system functions as a whole, enabling technicians to troubleshoot or modify the system effectively.

While wiring diagrams are also used to describe the physical layout of connections, a logic diagram emphasizes the logical operations rather than the physical arrangement. Therefore, the best choice that captures the essence and utility of a logic diagram in relation to the options provided is the wiring of individual instruments.