B) the wheels eliminate friction
bc the author is emphasising the importance of kinetic v/ potential energy, the answer could be D) comparision and contrast, but that has nothing to do with the wheels themselves. (actually there is no <span>mention</span> of wheels at all in the whole paragraph, so idk maybe it is D.)
Many proffessionals help their members find jobs, mant organizations offer proffessional development.
This aphorism means that “injuries” (which can be related to problems, disagreements, a harmful or painful situation) can be easily disappear just as dust do with a simple puff of air). On the other hand, the benefits you get by experiencing a conflict or a worrying situation will last for ever in the same way a craftsman caves into marble. All in all, people should look at the good side of things rather than the negative ones.
