In which aspect do entities differ from entity diagrams?

Entities and entity diagrams serve distinct purposes within the context of a data model in OutSystems. Entities represent the actual data structures that hold information in the application. Each entity corresponds to a specific type of data, such as a user, product, or transaction, and includes various attributes that define the characteristics of that data type.

Entity diagrams, on the other hand, provide a visual representation of those data structures alongside the relationships between them. They illustrate how entities interact with one another, showing how data flows and how different entities are related, but they do not hold data themselves. This visual mapping is crucial for understanding the architecture of the application's data model and aids in the design process.

Since entities embody the data and its structure while entity diagrams emphasize the relationships and interactions between those structures, the primary difference lies in their roles: entities are foundational data components, whereas entity diagrams serve as a conceptual tool for visualizing those components and their relationships. This distinction makes option B the clear choice, as it highlights the unique focus of entity diagrams compared to entities themselves.