Which of the following charts is a graphical representation of the causes of a specific event?

A histogram is a bar chart that shows the frequency distribution of data over a range, not the structured causes of a specific event.

A scatter diagram plots two variables against each other to identify correlation between them, not the categorized causes of a single event.

A fishbone diagram, also called an Ishikawa or cause-and-effect diagram, uses a fish-skeleton structure to categorize and display the potential causes of a specific outcome or defect. It branches major cause categories - such as people, process, equipment, and environment - into sub-causes, making it the standard quality tool for root cause analysis. It is used in project quality management specifically to identify why a particular event or problem occurred.

A Gantt chart is a timeline-based scheduling tool used to track project tasks and milestones, not to analyze causes of an event.