The passage suggests three theories about cause of the extinction of sea sow. The lecture completely refuses the passage. The speaker states these reasons are not accurate.
Firstly, the article points out that the native people were the main cause of the extinction because of overhunting. However, the professor says that the sea cow was very mass and huge with a height of 9 miles and weight of 10 tons in normal. Meanwhile, the population of native people was small and there was a lot of sea cow. Although they hunted sea cows, they were unlikely to hunt so much. This is directly contradicts what the reading says.
Secondly, the passage posits that the ecosystem distances caused a decline in food so sea cow went extinct. However, the speaker mentions that not only the food for sea cows but also the food for other animals would be reduced by the ecosystem distances, but the amount of other marine animals, such as whales, were not reported to decline. So the sea cows were not experienced food shortage. This is another part where is contradicted the reading passage.
Thirdly, the reading argues that the extinction of the sea cows was caused by the arrival of the European fur traders. The professor rejected this by explaining that the amount of the sea cows was actually small by the arrival of the European. The amount of the sea cows was larger thousands of years ago. It become to decline long before the arrival of those people, so it is not reasonable to say that it was European who arrived at last that the reason of the extinction.
Grammar and spelling errors:
Line 1, column 123, Rule ID: ENGLISH_WORD_REPEAT_BEGINNING_RULE
Message: Three successive sentences begin with the same word. Reword the sentence or use a thesaurus to find a synonym.
...lecture completely refuses the passage. The speaker states these reasons are not ac...
^^^
Line 7, column 310, Rule ID: IT_VBZ[1]
Message: Did you mean 'becomes'?
Suggestion: becomes
...s was larger thousands of years ago. It become to decline long before the arrival of t...
^^^^^^
Transition Words or Phrases used:
actually, also, but, first, firstly, however, second, secondly, so, third, thirdly, while, such as
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 17.0 10.4613686534 163% => OK
Auxiliary verbs: 1.0 5.04856512141 20% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 18.0 22.412803532 80% => OK
Preposition: 32.0 30.3222958057 106% => OK
Nominalization: 5.0 5.01324503311 100% => OK
Performance on vocabulary words:
No of characters: 1293.0 1373.03311258 94% => OK
No of words: 273.0 270.72406181 101% => OK
Chars per words: 4.73626373626 5.08290768461 93% => OK
Fourth root words length: 4.06481385082 4.04702891845 100% => OK
Word Length SD: 2.46061163434 2.5805825403 95% => OK
Unique words: 138.0 145.348785872 95% => OK
Unique words percentage: 0.505494505495 0.540411800872 94% => OK
syllable_count: 399.6 419.366225166 95% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Interrogative: 0.0 0.116997792494 0% => OK
Article: 11.0 8.23620309051 134% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 16.0 13.0662251656 122% => OK
Sentence length: 17.0 21.2450331126 80% => OK
Sentence length SD: 49.3735759288 49.2860985944 100% => OK
Chars per sentence: 80.8125 110.228320801 73% => OK
Words per sentence: 17.0625 21.698381199 79% => OK
Discourse Markers: 6.125 7.06452816374 87% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 10.0 4.27373068433 234% => Less facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.485586036423 0.272083759551 178% => OK
Sentence topic coherence: 0.16386210574 0.0996497079465 164% => OK
Sentence topic coherence SD: 0.107372570658 0.0662205650399 162% => OK
Paragraph topic coherence: 0.284774493443 0.162205337803 176% => OK
Paragraph topic coherence SD: 0.072782719125 0.0443174109184 164% => OK
Essay readability:
automated_readability_index: 9.4 13.3589403974 70% => Automated_readability_index is low.
flesch_reading_ease: 62.68 53.8541721854 116% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 8.7 11.0289183223 79% => Flesch kincaid grade is low.
coleman_liau_index: 9.92 12.2367328918 81% => OK
dale_chall_readability_score: 7.95 8.42419426049 94% => OK
difficult_words: 60.0 63.6247240618 94% => OK
linsear_write_formula: 6.5 10.7273730684 61% => Linsear_write_formula is low.
gunning_fog: 8.8 10.498013245 84% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
---------------------
Rates: 71.6666666667 out of 100
Scores by essay e-grader: 21.5 Out of 30
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Note: 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.