▶ Your Answer : The reading passage contends that there are three hypotheses that explain the cause of the extinction of Steller's sea cow's. On the other hand, the lecturer brings up several points that contradict this argument.
First, the speaker argues that over-hunting by native Siberian people is not a possible theory to explain the phenomena. This is because the native people did not need to hunt large number of the sea cows. The sea cows are massive creature. The sea cows are so large that only small number of them were enough to feed a lot of native people. Therefore, the number of the sea cows would not drop to the point of extinction. This counters the reading passage's assertion that the sea cows over-hunted by the native people, which leading the animal to extinction. Next, according to the lecturer, the disturbance of the ecosystem cannot be the main cause of the extinction. If there was ecological alteration near Bering Island, if should have affected not just the sea cows but also other sea creatures such as whales. However, the number of whales did not decline, and they did not experienced the shortage of food. This refutes the reading passage's claim that the sea cow's main source of food has declines the disturbance of the ecosystem.
The final point made by lecturer is that the advent of the European fur traders is not the main cause of extinction. The number of the sea cows was already small by the time when the European fur traders arrived. Therefor, there must have been something ongoing mainly causing that negatively affecting the number of the sea cows long before the Europeans arrived. This casts doubt on the reading passage's claim that European fur traders are the main causes of extinction of the sea cows.
Writing 0–30 score scale: Limited (1-16) / Fair (17-23) / Good (24–30)
ADDRESSING TOPIC
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ORGANIZATION
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PROGRESSION AND COHERENCE
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LANGUAGE USE
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GRAMMAR
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GOOD
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GOOD
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GOOD
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FAIR
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FAIR
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각 카테고리별 SCORE: LIMITED / FAIR / GOOD
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