Final answer:
Data Aggregation is the term used for the process of combining or associating various information elements which can reveal sensitive information that was not evident from individual data, thus requiring protection.
Step-by-step explanation:
The concept that involves combining or associating individual elements of unclassified information to identify an additional association or relationship that warrants protection is known as Data Aggregation. This term refers to the process where information from various sources is gathered and expressed in a summarized form for purposes such as statistical analysis. Data aggregation can sometimes reveal sensitive information that was not apparent from the individual pieces of data alone, thereby requiring careful management to avoid unintended breaches of privacy or security.