Final answer:
In a Data Flow Diagram (DFD), a bubble symbol represents a process where incoming data flows are transformed into outgoing data flows, not an entity, data storage, or a decision point.
Step-by-step explanation:
In a Data Flow Diagram (DFD), the bubble symbol, also known as a process or transformation symbol, depicts a process within which incoming data flows are transformed into outgoing data flows. This is essential for understanding how data moves through a system and is processed at various stages, transforming input data into output that can be used elsewhere. It is important to note that the bubble symbol does not represent entities, data storage locations, or decision points in the context of a DFD. These are represented by different symbols within the diagram. A DFD serves as a graphical representation of a system's data processing and is a core tool in systems analysis and design. It conveys the flow of data between processes, data stores, entities, and data sources.