Final answer:
In Data Flow Diagrams, the data flow is represented by an arrow, indicating the direction and movement of data between processes, data stores, and external entities.
Step-by-step explanation:
The Data Flow Diagram (DFD) symbol that is usually portrayed with an arrow is a. data flow. This symbol is used to represent the movement of data within the system, showing where data is coming from, where it's going, and how it gets there. In contrast, a data store is represented by two parallel lines, an external entity by a rectangle, and a process or internal entity by a circle or a rounded rectangle.