A graphical model is a type of diagram that shows the business logic of the requirements using symbols, shapes, colors, and lines. A graphical model can help to communicate, analyze, verify, and validate the requirements, as well as to support decision making and problem solving. A graphical model can be created using various techniques, such as flowcharts, mind maps, influence diagrams, and others12. Therefore, diagrams is the most general term that can be used to describe graphical models. The other options are specific types of diagrams, but not the only ones that can be used for graphical modeling. References:
1: BABOK® Guide, Version 3.0, p. 10
2: Business Analysis Expert Certification, CCBA® | IIBA®