Final answer:
The most popular database model is the Relational model, which organizes data into tables and establishes relationships between them using keys.
Step-by-step explanation:
The most popular database model is the Relational model. In this model, data is organized into tables, with rows representing records and columns representing attributes. The relationships between tables are established through keys, such as primary keys and foreign keys. This model is widely used in industry and is supported by popular database management systems like Oracle.