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.)
Busy old fool, unruly sun, Why dost thou thus Through windows and through curtains call on us? Must to thy motions lovers' seasons run? (from "The Sun Rising" by John Donne)
