GRE作文改革后对argument写作所造成的变化_GRE写作

GRE作文改革后对argument写作所造成的变化

　　Even if we acknowledge the alleged facts that deer population has dropped and temperature has risen, its too early to draw the conclusion that they have causal relationship. As a matter of fact, the population of one species highly depends on several factors, like the quantity of their prey and predators, besides temperature. To be specific, a lethal epidemic could decimate deer in the Arctic Circle, while it has nothing to do with global warming. Without taking such factors into consideration, the author draws the conclusion too hastily and presumptuously.

　　Finally, granted that decrease in population does result from global warming, the author naively accuses it of devastating the migration pattern adopted by arctic deer. As I have mentioned above, the survival of a species is highly dependent on many factors. Provided that global warming, with a significant increase of ambient carbon dioxide, has greatly acidified the ocean, it is likely that plants which need water to sustain their life would be threatened or even killed. Therefore, failure to investigate other possibilities renders authors statement untenable.

　　To sum up, the author fails to provide substantial evidence proving his allegation regarding deer population and temperature. Whats more, he is unable to prove there is a causal relationship between them. If he could have present more accurate and specific data regarding deer population and temperature, as well as scrutinized another potential factors contributing to population change, his statement would likely be more persuasive.