Final answer:
A decline in Work-related Musculoskeletal Disorders (WMSDs) can be linked to early and ergonomic interventions and proper design of workstations and tools, with chair height being a key concern for human factors psychologists.
Step-by-step explanation:
Decline in Work-related Musculoskeletal Disorders (WMSDs) may be associated with the recognition of the need for early intervention, ergonomic intervention, and proper work station or tool design.
Within the context of a human factors psychologist’s concern in an office workstation, the height of the chair would be a primary focus. This is because ergonomics, which is the study of the interaction between humans, tools, and work systems, greatly emphasizes the physical setup of work environments to promote health and performance. Choice 'a' from the listed options, height of the chair, is the correct answer as this aspect affects the posture, comfort, and potentially the musculoskeletal health of an office worker. Proper ergonomic design is crucial for preventing WMSDs, which include a range of conditions such as carpal tunnel syndrome, tendinitis, and lower back injuries that can be caused by poor workspace design and repetitive strain.