In the given set of materials, the main topic is centered on finding the main justification of Steller's sea cow extinction. While the author has focused on the three main proposed causes, the speaker in the follow-up material cast doubt on those points in a number of ways.
The first point in the article is that excessive amount of sea cow' hunting by the Siberian has posed this species at the a verge of extiction. However, this concept was questioned by the lecturer as he mentioned that due to its huge body, only a couple of them could supply the food resource of natives for long time, not required overhunting.
Moreover, according to the essay, another possible reason could be lack of sea cow's main food resource, known as kelp, because of changes in ecosystems. Nonetheless, the orater discussed that there was not any indications proved that others marine population such as whales, declined. Hence, the amount of kelp remained unchanged.
Last but not least, the writer has stated that the entrance of European traders who started massacre of the sea cow for its fur, could explain its extiction. Conversly, according to the professor, when the European arrived the island, this species population was so small based on other pervious occurence.
Grammar and spelling errors:
Line 3, column 118, Rule ID: DT_DT[1]
Message: Maybe you need to remove one determiner so that only 'the' or 'a' is left.
Suggestion: the; a
... the Siberian has posed this species at the a verge of extiction. However, this conce...
^^^^^
Discourse Markers used:
['but', 'first', 'hence', 'however', 'if', 'moreover', 'nonetheless', 'so', 'while', 'such as']
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance in Part of Speech:
Nouns: 0.274261603376 0.261695866417 105% => OK
Verbs: 0.143459915612 0.158904122519 90% => OK
Adjectives: 0.084388185654 0.0723426182421 117% => OK
Adverbs: 0.0379746835443 0.0435111971325 87% => OK
Pronouns: 0.0210970464135 0.0277247811725 76% => OK
Prepositions: 0.151898734177 0.128828473217 118% => OK
Participles: 0.0548523206751 0.0370669169778 148% => OK
Conjunctions: 2.64980198344 2.5805825403 103% => OK
Infinitives: 0.0126582278481 0.0208969081088 61% => OK
Particles: 0.0 0.00154638098197 0% => OK
Determiners: 0.130801687764 0.128158765124 102% => OK
Modal_auxiliary: 0.0126582278481 0.0158828679856 80% => OK
WH_determiners: 0.0084388185654 0.0114777025283 74% => OK
Vocabulary words and sentences:
No of characters: 1266.0 1645.83664459 77% => OK
No of words: 211.0 271.125827815 78% => More content wanted.
Chars per words: 6.0 6.08160592843 99% => OK
Fourth root words length: 3.81127787577 4.04852973271 94% => OK
words length more than 5 chars: 0.364928909953 0.374372842146 97% => OK
words length more than 6 chars: 0.284360189573 0.287516216867 99% => OK
words length more than 7 chars: 0.194312796209 0.187439937562 104% => OK
words length more than 8 chars: 0.118483412322 0.113142543107 105% => OK
Word Length SD: 2.64980198344 2.5805825403 103% => OK
Unique words: 132.0 145.348785872 91% => OK
Unique words percentage: 0.625592417062 0.539623497131 116% => OK
Word variations: 63.7023301575 53.8517498576 118% => OK
How many sentences: 9.0 13.0529801325 69% => OK
Sentence length: 23.4444444444 21.7502111507 108% => OK
Sentence length SD: 38.8132597936 49.3711431718 79% => OK
Chars per sentence: 140.666666667 132.220823453 106% => OK
Words per sentence: 23.4444444444 21.7502111507 108% => OK
Discourse Markers: 1.11111111111 0.878197800319 127% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 3.39072847682 29% => OK
Readability: 51.8804634018 50.5018328374 103% => OK
Elegance: 2.375 1.90840788429 124% => OK
Coherence and Cohesion:
Essay topic to essay body coherence: 0.725660776439 0.549887131256 132% => OK
Sentence sentence coherence: 0.133418303139 0.142949733639 93% => OK
Sentence sentence coherence SD: 0.08084997552 0.0787303798458 103% => OK
Sentence paragraph coherence: 0.691621038692 0.631733273073 109% => OK
Sentence paragraph coherence SD: 0.131776302041 0.139662658121 94% => OK
Sentence topic coherence: 0.377000806643 0.266732575781 141% => OK
Sentence topic coherence SD: 0.11768528224 0.103435571967 114% => OK
Paragraph paragraph coherence: 0.346647492126 0.414875509568 84% => OK
Paragraph paragraph coherence SD: 0.0438465675307 0.0530846634433 83% => OK
Paragraph topic coherence: 0.519939433899 0.40443939384 129% => OK
Paragraph topic coherence SD: 0.0406615106688 0.0528353158467 77% => The ideas may be duplicated in paragraphs.
Task Achievement:
Sentences with positive sentiment : 2.0 4.33554083885 46% => OK
Sentences with negative sentiment : 1.0 4.45695364238 22% => OK
Sentences with neutral sentiment: 6.0 4.26048565121 141% => OK
Positive topic words: 2.0 3.49668874172 57% => OK
Negative topic words: 1.0 3.62251655629 28% => More negative topic words wanted.
Neutral topic words: 3.0 3.1766004415 94% => OK
Total topic words: 6.0 10.2958057395 58% => OK
What are sentences with positive/Negative/neutral sentiment?
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Rates: 83.3333333333 out of 100
Scores by essay e-grader: 25.0 Out of 30
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Note: This is not the final score. The e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.