What is a key feature of flow charts?

Flow charts are primarily designed to visually depict process flows and relationships, making it easy to understand how different steps in a process connect to one another. This visual representation allows individuals to see the sequence of steps or stages in a process, including decisions, inputs, and outputs, all in one glance. This clarity is crucial for both understanding and communication among team members involved in process management or analysis.

While the other options mention features that could be associated with other tools and methodologies, they do not encapsulate the primary purpose of flow charts as effectively as the chosen answer does. Flow charts are not specifically rule-based in logic, do not inherently utilize multiple levels of nesting (which is more characteristic of certain programming constructs or other diagram types), and while they can document algorithms, that is not their central function. Their primary strength lies in their ability to visually convey how a process unfolds, which is essential for training, process improvement, and documentation in business settings.