What is a key element of flow diagrams that helps visualize the flow of actions or decisions?

The use of shapes and symbols is a fundamental aspect of flow diagrams, as they provide a visual representation of processes, actions, and decisions. Each shape in a flow diagram has a specific meaning: for example, ovals typically represent the start and end points, rectangles depict processes or instructions, diamonds signify decision points, and arrows indicate the flow of control or sequence of steps.

This visual approach makes it easier to understand complex processes at a glance, as opposed to purely textual descriptions or mathematical equations, which may not convey the flow as intuitively. The reliance on standardized shapes and symbols helps ensure that anyone familiar with flow diagrams can easily interpret the process being represented, facilitating clearer communication of ideas.