The statement "To understand the organization of how a bill becomes a law, a flow chart, not a Venn diagram, is best," is correct.
A flowchart refers to a sort of diagram that represents an algorithm, workflow or process. Flowchart may be described as a diagramatic representation of an algorithm (step by step approach to solve a task). Furhtermore, this type of charts, shows the steps as boxes of various kinds, and their order by linking the boxes with arrows.