Which principle emphasizes that the design should adapt to an individual’s preferences and abilities?

The principle that emphasizes that the design should adapt to an individual's preferences and abilities is Flexibility in use. This principle is focused on providing a range of ways to use a product or service, allowing it to cater to the diverse abilities and preferences of different users. By incorporating flexibility, designs can accommodate various user needs, such as offering adjustable settings, multiple modes of interaction, or alternative ways to accomplish tasks. This adaptability is crucial in creating accessible environments that enhance usability for all, regardless of their physical or cognitive abilities.

Other principles, such as Equitable use, which promotes fairness in access, and Simple and intuitive use, which focuses on straightforwardness in operation, do not specifically emphasize the need for adaptability to individual preferences and abilities. Low physical effort concentrates on minimizing exertion in the use of the design, but it does not address the broader concept of flexibility in accommodating a range of user choices and capabilities.