Choose from the list below the best definition of Entity Relationship Diagrams $($ERDs$).$

An ERD is a diagram that illustrates the employees in the company and their reporting relationship with one another. Similar to process flowcharts, ERDs are a documentation method that depicts the steps of a business process from start to finish.

An ERD is the visual representation of an information flow within a system.

An ERD is a graphical illustration of all the tables and their relationships in a database.