Which of the following would be considered a key component of a use case diagram?

A use case diagram is a visual representation that captures functional requirements of a system, outlining interactions between users (actors) and the system itself. One of the fundamental components of a use case diagram is task scenarios, which represent specific actions or workflows that users or system actors undertake to achieve a goal or complete a task. These scenarios help clarify what the system should do from a user perspective, making them integral to understanding the functionality that must be modeled in the diagram.

The other options—mind maps, data flow charts, and rich pictures—serve different purposes in the realm of business analysis and modeling. Mind maps are primarily used for brainstorming and organizing thoughts, while data flow charts focus on the flow of information and processes within a system. Rich pictures are visual representations used to depict complex, real-world situations in a more symbolic and qualitative manner. Although these tools are beneficial in their own contexts, they do not directly relate to the components of use case diagrams in the same way that task scenarios do.