Which concept is primarily associated with visualizing the data structure of a database through relationships?

The concept that is primarily associated with visualizing the data structure of a database through relationships is entity-relationship modeling. This approach facilitates the representation of the data and its relationships in a clear, graphical format, often using diagrams to illustrate entities (which represent tables in the database) and the relationships between them.

Entity-relationship modeling helps database designers identify how data elements interact, thereby providing a solid foundation for constructing the database schema. This visualization makes it easier to understand complex relationships, constraints, and dependencies among the data, which is crucial for effective database planning and design.

Other concepts, such as normalization, are focused more on organizing and structuring the data to reduce redundancy and improve data integrity, rather than providing a visual representation. Schema design similarly refers to the overall architecture and structure of the database without necessarily emphasizing the graphical visualization of relationships. Database management pertains to the operational aspects of maintaining and interacting with a database, which is distinct from the initial design and visualization tasks addressed by entity-relationship modeling.