Integrated writing, TPO 29: Edmontosaur's survival on Alaska's North Slope

The writer discusses the reason for Edmontosaur’s survival in Alaska’s North Slope, and states that they survived because of their migration south to more hospitable regions. The writer further provides three reasons of support for the migration hypothesis. However, the speaker refutes each of the writer’s reasons.
Firstly, the writer reasons that the Edmontosaur’s diet supports the migration hypothesis. The professor disclaims this by stating that these dinosaurs could find food in their habitat without migration south because the region had a warmer climate in summer. She further explains that in the Arctic region, the sun was in the sky about 20 hours a day, thus there was good condition for vegetation to grow widely in summer. In winter, however, most of the vegetation became dead, but the dead of them also provides enough nutrition for Edmontosaurs to feed and survive.
Secondly, the writer reasons that living of Edmontosaurs in herd supports the migration hypothesis. The professor disaffirms this by providing examples of two kinds of animals which live in herd but do not migrate. She further reasons that living in herd does not necessarily means that animals migrate, because they might have other reasons to live together, such as extra protection from predators.
Thirdly, the writer professes that Edmontosaurs were migrating long distances because they could do so. However, the professor claims that this reason suffers from logical defect, because the capability to migrate long distances does not substantiate the existence of migration. The professor further reasons that although Edmontosaurs could run very fast but their children could not do so. Therefore, during migration, the herd must walk slowly in companion with the children and they could not reach their destination by this way. So, the migration hypothesis is truly problematic.

TOEFL listening lectures: A university lecture by a professor of Natural History

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Hi Keivan, I thought your essay was quite good. You have addressed all of the main points of the lecture. You do have a few minor errors and there are a couple more details you could have added. Overall, I would rate this a 4.5 out of 5. I also included another essay so you can see what a 5 would look like.

Thank you very much for your corrections and hints
Nevertheless, I have a problem regarding the independent task
You said that there are a couple more details I could have added. You mean details of the reading or the listening?
The essay you mentioned does not add more details from the listening than mine, but it adds more details from the reading. Noteful says that it’s better to add details from reading as less as possible, only one sentence in each paragraph, because it does not bring you any scores, and the scores lie on the listening part. Do not you agree with this?
Please reply as soon as possible dear Mr. Luschen because I will have TOEFL tomorrow morning.
Regards

Yes, I guess I didn’t realize that those extra details were from the reading. I agree that the important thing is to concentrate on the lecture, but if you have enough time, adding some extra details from the reading can make the differences between the reading and the lecture more clear. Your content was probably good enough to get a 5, if you could have eliminated your usage errors. Good luck to you in the test! Please let me know how you do.

Hello Keivan , what does TPO 20 mean as you wrote in your thread?
Huriah.

Dear Luschen,
Thank you very very much for your big helps.
My TOEFL score arrived with writing score of 28 and total score of 101.
I really owe my success to English Test and YOU!

I left you a private message with a question.