What do functional requirements primarily address in software development?

Functional requirements primarily focus on what an object or system should do, detailing the behaviors and functions necessary to satisfy the needs of users and stakeholders. This encompasses the specific actions, tasks, and responses that the software is expected to perform in various scenarios. For example, in an online shopping application, functional requirements would specify features such as user authentication, product search capabilities, and the checkout process. By clearly defining these capabilities, functional requirements serve as a guide for both the development team and the stakeholders to ensure the final product meets the intended goals and user expectations.

In contrast, other options deal with aspects of implementation or structure rather than the desired functionality of the software. The emphasis on what an object should do highlights the importance of user-oriented features and capabilities in the software development process.