Final answer:
Useful privacy focuses on how human factors, especially intended user's behavior, impact privacy., aiming to design intuitive systems that enhance user understanding and management of their personal data protection. The correct answer is option: a. Useful privacy
Step-by-step explanation:
The concept that focuses on how human factors, especially intended user's behavior, impact privacy is known as usable privacy. This area of study within human factors psychology or ergonomics examines how individuals interact with technology and systems, particularly concerning personal data protection and privacy issues. Usable privacy considers the design and functionality of security features in ways that are intuitive for the users, so they understand and can effectively manage their privacy.
For example, the study of usable privacy would be concerned with how privacy notices are presented to users and whether they are clear enough for users to make informed decisions about their data. It is aimed at improving the user experience regarding privacy, which involves designing systems and practices that users can easily navigate and understand, thereby enhancing security through better user compliance and decision-making.