Which method is best for showing how the parts of an item are assembled?

An exploded diagram is the most effective method for showing how the parts of an item are assembled because it visually separates the components while still maintaining their spatial relationships to each other. This method allows viewers to see each individual part clearly, making it easier to understand how they fit together during the assembly process. The exploded view provides a three-dimensional perspective, which can help illustrate complex assemblies by showing the sequence in which parts can be put together or disassembled.

In contrast, a photograph captures the assembled item but does not effectively communicate the individual components or their arrangement. An organizational chart is useful for displaying relationships within a group or organization, not for showing physical assembly. A pie chart specifically presents data distributions and proportions; it is not designed for illustrating how parts of an object come together. Thus, the exploded diagram stands out as the most suitable choice for assembly visualization.