Answer:
b.is the answer ...........
It depends on how you worded your essay and what your views on global warming are, the way I would word it is "in conclusion global warming is real and changing drastically every minute, and we don't fully know exactly how it will affect the world long-term" that's one way you can say it.
You did not provide the excerpt, however, imagery is using words to create images by describing every aspect of some entity. A metaphor is a type of figurative language that compares one thing to another, such as calling a man a lion because of his bravery. You can use this logic to find the correct answer in your excerpt.
Mature or adult would be your answer.
The answer is: it is about evolution.
Darwin himself characterized his seminal book, <em>On the origin of the species, </em>as “one long argument”. There is still debate as to what exactly did he mean by that characterization, but it is agreed upon that he evidently was referencing his theory of evolution based on common ancestry between species and natural selection as the process of differentiation between them, which, all in all, tells a story that took millions of years, or, in more poetic terms, it summarizes a very long argument.