Final answer:
An Entity-Relationship Diagram (ERD) is the most popular method to model a database as it graphically represents entities and their interrelationships, unlike pie charts, bar graphs, or tables which are used for data display.
Step-by-step explanation:
The question is asking about the most popular method to model a database. The correct answer is an Entity-Relationship Diagram (ERD), which is used widely in database design. An ERD is a graphical representation of entities and their relationships to each other, typically used in computing in regards to the organization of data within databases or information systems. Although pie charts are useful for displaying data, they are not commonly used to model databases. They are more suited for illustrating how a whole is divided amongst several categories. Similarly, tables and bar graphs are tools for organizing and displaying data but do not model relationships and entities like an ERD does.