Fossil evidence indicates that the blompus-an extremely large, carnivorous land mammal-inhabited the continent of Pentagoria for tens of thousands of years until its sudden decline and ultimate extinction about twelve thousand years ago. Scientists have d

The author of the argument has failed to convience us that the significant climate change and human predation were the causes for the blompus mammal extinction. The argument, as it stands, is based on questionable assumptions and a faulty line of reasoning, a fact which renders it over simplistic and unconvincing.

First of all, the argument assumes that the blompus sample population is representative. The author's main assumption is that blompus population was only distributed along the Pentagoria region. However, there could be other potential areas or continents which may sustain a significant population of the blompus mammal, which in turn implies that the mammal may have survived or not even have experienced the significant climate change or the arrival of the first humans in those regions, and become extinct at a later point in time by some other unknown factor.

Second, the author assumes that these large mammals were somehow incompetent to survive the severe climate changes along with the disruption of food chain and human predation. However, the author says nothing about any other possibly larger carnivorous primal mammal that could hunt and feast on the blompus during the so called food chain disruption. Furthermore, the unlikelihood accumulates with the low possibility that early humans were able to hunt and kill the majority of these carnivorous mammal population since there is no report on any advanced hunting weaponry that humans could have developed in those primitive times.

Finally, the argument is based on a questionable cause and effect assumption. The only reason offered for believing that the period of climate change and the arrival of the first humans caused the extinction of the blompus mammal is the fact that the former precedes the latter. No additional evidence linking the two events is offered in the argument, apart from the abstract "coincided" claim, thus leaving open the possibility that since the time scale is in thousands of years, the extinction could have happened long before the climate change or the arrival of humans. While climate change and humans' arrival may have been a contributing factor, to show a clear causal connection the author must examine and rule out various other factors.

To conclude, the argument is based on unsubstantiated assumptions and poor evidence does not provide concrete support for its conclusion. If it had included the aforementioned arguments, it would have been more thorough and convincing.

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Sentence: The author of the argument has failed to convience us that the significant climate change and human predation were the causes for the blompus mammal extinction.
Error: convience Suggestion: convince

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argument 1 -- not OK. This essay topic relates the area to Pentagoria only.

argument 2 -- partly correct.

argument 3 -- not OK. You have to accept the extinction could happen during the climate change or the arrival of humans.
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Think about it:

for climate change:

1. Maybe there was another serious climate change already happening before this climate change, however blompus can survive.

2. Maybe this climate change was mild and blompus can pass the difficulties.

for the arrival of the first humans:

1. It is hard to hunt them since they are big

2. Even though human can hunt them, since they are extremely large, it takes time to consume them and this will not cause the animal extinction.
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Attribute Value Ideal
Score: ? out of 6
Category: Satisfactory Excellent
No. of Grammatical Errors: 0 2
No. of Spelling Errors: 0 2
No. of Sentences: 14 15
No. of Words: 397 350
No. of Characters: 2064 1500
No. of Different Words: 197 200
Fourth Root of Number of Words: 4.464 4.7
Average Word Length: 5.199 4.6
Word Length SD: 2.739 2.4
No. of Words greater than 5 chars: 160 100
No. of Words greater than 6 chars: 114 80
No. of Words greater than 7 chars: 72 40
No. of Words greater than 8 chars: 51 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 28.357 21.0
Sentence Length SD: 13.952 7.5
Use of Discourse Markers (%): 0.714 0.12
Sentence-Text Coherence: 0.366 0.35
Sentence-Para Coherence: 0.619 0.50
Sentence-Sentence Coherence: 0.069 0.07
Number of Paragraphs: 5 5

You are asked to give other explanations. This is a new GRE essay topic which is different to traditional GRE topics. So your argument 1 and argument 3 are not correct.

possible explanations for this topic:

1. Maybe humans eat one food which is on the food chain of the big animal, and the food is limited because of the climate change. The animal died quickly because of the food.

2. Maybe humans bring a virus in this area and because of the climate change, the virus spread quickly around the area, and the big animals are victims of the virus.

3. ....you can think more.

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All argument essay topics you chose are difficult. You may start to choose some easy ones , then go difficult ones.