The correct answer is: C. Schema
A schema is a description of the structure of a database. It defines the tables, columns, and relationships between the data in the database. A schema is used to create a database and to define the data that can be stored in the database.
A module is a self-contained unit of code that can be reused in multiple applications. A module is typically used to encapsulate a set of related functions or data.
A relational model is a way of representing data in a database. In a relational model, data is stored in tables, and each table has a set of columns and rows. The columns represent the attributes of the data, and the rows represent the instances of the data.
A sub-schema is a subset of a schema. A sub-schema is used to define a view of the data in a database for a particular application.
In conclusion, the way a particular application views the data from the database that the application uses is a schema.