If a task has high repetition but each movement is light, why can risk still exist?

Correct answer: Because even light movement can accumulate strain when repeated often

Direct answer: A, repeated light movements can accumulate strain. Ergonomic risk depends on more than the weight or force of one movement. When the same action is performed frequently, the same muscles and joints may receive little recovery between repetitions. Over time, fatigue or discomfort can build, particularly if posture is fixed, the pace is high or rest breaks are insufficient. A is correct because it recognises cumulative exposure: a small demand repeated many times may become a substantial total demand. B is wrong because light does not mean risk-free. C denies the known importance of repetition in work analysis. D is wrong because suitable pauses and variation can help recovery; the exact need depends on the task and worker. Memory cue: assess force and frequency together—small loads can still matter when repeated for long periods.