It's D because a noun is a person place or thing!
Humans see themselves as the epitome of nature and as indomitable rulers. They consider themselves on top of the hierarchical ladder, imposing their will on other species, plant and animal alike. On the other hand, to black holes, humans are nothing more than minute creatures, fragile and unimportant. They are curious insects who consider themselves with pride and ego.
These are contrasting opinions, with black holes believing that humans are dismissible and with humans believing that they are invincible.
Expand on this idea according to the context of your lesson.
The second paragraph relies from an expert opinion to support the organizations' point of view. It is because this paragraph shows the reason why the amount of ice in the Arctic is decreasing. Professor Peter Wadhams of Cambridge University is shown as an expert. Statistics is also shown as proof which is the IPCC estimate from 2007.
The correct answer is A. Non-fiction