Data related to physical characteristics used to optimise the user's safety, health, comfort and performance.

• A. Psychological factor data
• B. Secondary data
• C. Range of sizes
• D. Physiological factor data

Answer: (D)

Data about the body's physical characteristics used to optimise safety, health, comfort and performance is best described as physiological factor data. This covers measurements of body size, shape, strength, mobility, and other bodily functions that designers use to ensure products or environments fit the user and support safe, comfortable use.

Psychological factor data deals with mental states and behavior, not physical measurements. Secondary data refers to information gathered for purposes other than the current design task or from existing sources, not specifically about physical traits. A range of sizes indicates available options to accommodate different users, rather than a data category describing those users' physical characteristics.