Which of the following correctly describes a Functional Requirement?

A functional requirement specifically defines the behaviors and functions of a system. It outlines what the system should do and describes everything the system must accomplish in terms of data processing and interactions.

Data entry, procedural, and retrieval requirements are all fundamental aspects of functional requirements. Data entry requirements outline how data will be inputted into the system, including the format and method of entry. Procedural requirements detail the processes that the system needs to carry out, such as business rules or workflows that must be followed to achieve intended outcomes. Retrieval requirements specify how data can be accessed and retrieved from the system by users or other systems when needed.

In contrast, other options focus on different types of requirements which do not pertain directly to the functional behavior of the system. For example, business policies, legal, and language requirements relate to compliance and usability but do not define the functions the system must perform. Similarly, performance, security, and archiving requirements pertain more to non-functional aspects, including how well the system performs and how it secures data. Lastly, hardware, software, and internet requirements are concerned with the technological environment necessary for the system to function rather than the specific actions or services it provides. Thus, the choice clearly aligns with the definition of functional requirements.