When demonstrating a reversible change, which of the following would be the most effective way to show that the change is truly reversible?
1 )
Performing the change once and describing how it could theoretically be reversed
Performing the change in one direction and then reversing it to return to the original state
3 )
Showing a video of the change being performed by someone else
4 )
Explaining the scientific principles behind reversible changes without demonstrating
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