When the bag of sugar is lifted to the first shelf, work is done against gravity to raise it to that height. Lifting it again to a second, higher shelf requires additional work, which is proportional to the increase in height. Therefore, the total work done is the sum of the work for each lift, indicating that higher lifts require more energy due to the greater gravitational potential energy gained. Thus, the correct conclusion is that the total work done increases with the height to which the bag is lifted.
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