Rules specify which users have what type of access to which data in the database.

Authorization is the correct answer for the above question.

Explanation:

In any database, there is a security mechanism, by which the database is secured and can not be accessed by any unauthorized person. The main security of a database is an Authorization rule. In this rule, the user needs to specify in front of the database that he is the right user. This can be done with the help of the Authorization processor.

In the Authorization processor, a user needs to tell the unique id and password from the login form of the database and then the database authorized that person if his unique id and password match from the database user accounts. The above question asked about the processor or rule through user get entered on the database. Then the answer is Authorization processor.