Who does the work in lifting magnetic material with natural magnets?

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Kolahal Bhattacharya
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Lorentz force law tells us that workdone by magnetic force=0.Griffiths illustrates an example where work is done by the battery in a circuit.But I am intersted in something more.Who does the work of lifting some magnetic material when we use natural magnets?What is the way of energy conservation?What is the origin of force?
 
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Kolahal Bhattacharya said:
Lorentz force law tells us that workdone by magnetic force=0.Griffiths illustrates an example where work is done by the battery in a circuit.But I am intersted in something more.Who does the work of lifting some magnetic material when we use natural magnets?What is the way of energy conservation?What is the origin of force?
You might wish to review past discussions on this interesting question. Here is a https://www.physicsforums.com/showthread.php?t=121922"

AM
 
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In AM's link, pay special attention to Doc Al's and Gokul's posts .