Which branch of ergonomics focuses on body measurements?

The correct choice, which focuses on body measurements, is anthropometrics. This branch of ergonomics is concerned with understanding human body dimensions and proportions, which are critical when designing products, workspaces, and environments to ensure they are suitable and comfortable for users. By applying anthropometric data, designers can create items that fit a wide range of body sizes and shapes, enhancing user experience and efficiency.

In contrast, aesthetics relates to the visual appeal or beauty of a product but does not factor in measurements or human dimensions. A design brief is a document that outlines the objectives and requirements of a project rather than a branch of ergonomics. Lean manufacturing focuses on optimizing production processes by reducing waste and improving efficiency but does not pertain directly to body measurements or ergonomics. Therefore, anthropometrics uniquely addresses the importance of body measurements within ergonomics, making it the correct answer.