The lines between boxes in a data flow diagram for responding activity represent system components' data flows. These do not indicate sequencing because they only show the flow of data. Those lines in activity diagrams are simply transitions between activities and do not represent data flow. The primary distinction between a Data flow diagram for responding movement and a flowchart of an activity diagram is a UML behavior diagram illustrating the workflow of the system's stepwise activities. In contrast, a flowchart is a graphical diagram representing the steps to solve a problem.