Discussion
Bending and carrying respectively belong to which kind of effort ?
Answer: B
In classifying the kind of effort, bending the body uses the trunk and is torsal effort, while carrying a load is done by the hands and arms and is manual effort. Pedal effort is foot work, as in operating a treadle, and mental effort is thinking. The pair that gives bending as torsal and carrying as manual is option B, Torsal and Manual. The others place pedal effort against one of these activities, which is wrong.
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