Match the relational database function to the appropriate relational database term:

$\backslash$table$[[$Relational Database Function,Relational Database Term$],[1.$ Serves as a unique identifier in a database table.,Primary key$],[2.$ Creates a relationship between two tables.,$],[3.$ Two foreign keys from the tables that it is linking combine to make up a unique identifier.,Composite primary key$],[4.$ Describes each record with characteristics with actual business information.,Descriptive attributes$],[5.$ A means of storing data to ensure data is complete, redundant, to help enforce business rules.,Foreign key$]]$