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Creating an entity-relationship diagram involves identifying the main entities, defining their attributes, establishing relationships between them, and specifying the cardinality. The entities represent real-world ____ that need to be stored in the database. Attributes describe the properties or characteristics of these entities. The relationships define how the entities are ____ with each other. Cardinality specifies the ____ of occurrences of one entity in relation to another entity.

Creating an entity-relationship diagram helps in visualizing the database structure and provides a blueprint for implementing the database ____. By following the steps of identifying entities, defining attributes, establishing relationships, and specifying cardinality, we can create an effective entity-relationship diagram that represents the system's low-level ____.