I am sort of puzzled on this particular question; however, I think I solved it. Okay, so the text starts with explaining the benefits of coffee, then it proceeds to explain the negative affects of consuming coffee. Transition words like <em>on the other hand</em> are commonly used when contrasting ideas. Hence, I believe the correct answer is c. contrast.
Answer:
What do you need help with?
Explanation:
In my opinion, the second main argument in "The Human Drift" is that human wandering across the planet, back and forth, has always been fueled by fear, while motivated by the search of food (as the first argument says). It is a primal fear that, if you don't eat, you will end up in someone else's stomach. Here is a nice excerpt that illustrates this argument: "Dominated by fear, and by their very fear accelerating their development, these early ancestors of ours, suffering hunger-pangs very like the ones we experience to-day, drifted on, hunting and being hunted, eating and being eaten, wandering through thousand-year-long odysseys of screaming primordial savagery, until they left their skeletons in glacial gravels, some of them, and their bone-scratchings in cave-men's lairs."
