Why is understanding human limits important in ergonomics?

Correct answer: To keep work according to the person's capacity

The direct answer is option A: understand human limits so that work can be arranged according to a person's capacity. Human limits include strength, reach, posture, attention, endurance and the ability to repeat an action safely. Step by step: identify what the worker can comfortably do; match the task, tool and workload to that ability; avoid excessive force, awkward posture and unreasonable repetition; provide suitable adjustments or rest; then work becomes safer and more possible. Option A is correct because ergonomics adapts work to people, while also improving efficiency. Option B is the opposite of the aim because causing pain increases risk and reduces wellbeing. Option C is wrong because darkness reduces visibility and may cause accidents. Option D is unrelated and hiding tools makes work less organised and safe. Memory cue: fit the work to the person, not the person to harmful work.