What cascade option enables you to change the data in the primary key in the table on the one side of the relationship?

The cascade option that enables changes to the primary key in the table on the one side of the relationship is known as "CASCADE" on update. When this option is set, any updates to the primary key in the parent table will automatically propagate to the corresponding foreign key values in the child table, ensuring referential integrity across the relationship. This helps maintain consistent data and reduces the risk of orphaned records in the child table.