The reading introduces three possible reasons for the extinction of the Steller's sea cow, a huge marine mammal that once lived around Bering island off the coast of Siberia. The lecturer refutes all the given reasons and refutes each one of them.
First, the reading states that the first possible reason for the extinction of these mammals is hunting . The native people used it as a source of food. The lecturer, however, refutes this claim by stating the these animals has a huge massive size, and just one animal was able to feed very large numbers of people. With the relatively few population in area and the massive size of these animals, so it is unreasonable to consider that the hunting was the reason for the extinction of these animals.
Second, the reading suggests that the ecological change in the climate maybe the reason for the extinction of the see cows. The lecturer, on the other hand, rebuts this suggestion by saying that if the extinction was due to the climate change, it should have affected other animals like the whales which lived at the same time, but there is no evidence that supports this hypnosis.
Third, the reading mentions another possible reason which is the trading of the fur by European who came to the island, so they started over hunting these animals for the sake of its fur. The lecturer contends this claim by stating the arrival of those traders actually happened when the numbers of the sea cows had already decreased. In other words, the extinction started before the arriving of the European fur traders.
Finally, we can conclude that the exact reason for the extinction of the sea cows is uncertain or unknown until now. It is unlikely to be any of the reasons mentioned in the reading.
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Grammar and spelling errors:
Line 3, column 104, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Don't put a space before the full stop
Suggestion: .
...e extinction of these mammals is hunting . The native people used it as a source o...
^^
Line 3, column 337, Rule ID: MANY_NN[1]
Message: Possible agreement error. The noun population seems to be countable; consider using: 'few populations'.
Suggestion: few populations
... numbers of people. With the relatively few population in area and the massive size of these a...
^^^^^^^^^^^^^^
Transition Words or Phrases used:
actually, but, first, however, if, may, second, so, third, in other words, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 7.0 10.4613686534 67% => OK
Auxiliary verbs: 1.0 5.04856512141 20% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 22.0 22.412803532 98% => OK
Preposition: 33.0 30.3222958057 109% => OK
Nominalization: 9.0 5.01324503311 180% => OK
Performance on vocabulary words:
No of characters: 1296.0 1373.03311258 94% => OK
No of words: 268.0 270.72406181 99% => OK
Chars per words: 4.83582089552 5.08290768461 95% => OK
Fourth root words length: 4.04607285448 4.04702891845 100% => OK
Word Length SD: 2.34018339307 2.5805825403 91% => OK
Unique words: 143.0 145.348785872 98% => OK
Unique words percentage: 0.533582089552 0.540411800872 99% => OK
syllable_count: 406.8 419.366225166 97% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Interrogative: 0.0 0.116997792494 0% => OK
Article: 11.0 8.23620309051 134% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 11.0 13.0662251656 84% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 24.0 21.2450331126 113% => OK
Sentence length SD: 58.1734368963 49.2860985944 118% => OK
Chars per sentence: 117.818181818 110.228320801 107% => OK
Words per sentence: 24.3636363636 21.698381199 112% => OK
Discourse Markers: 8.36363636364 7.06452816374 118% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 0.0 4.45695364238 0% => More negative sentences wanted.
Sentences with neutral sentiment: 8.0 4.27373068433 187% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.309914767498 0.272083759551 114% => OK
Sentence topic coherence: 0.117786996016 0.0996497079465 118% => OK
Sentence topic coherence SD: 0.0734799830408 0.0662205650399 111% => OK
Paragraph topic coherence: 0.183429676742 0.162205337803 113% => OK
Paragraph topic coherence SD: 0.0610977353953 0.0443174109184 138% => OK
Essay readability:
automated_readability_index: 13.5 13.3589403974 101% => OK
flesch_reading_ease: 55.58 53.8541721854 103% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.5 11.0289183223 104% => OK
coleman_liau_index: 11.09 12.2367328918 91% => OK
dale_chall_readability_score: 7.95 8.42419426049 94% => OK
difficult_words: 53.0 63.6247240618 83% => More difficult words wanted.
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 11.6 10.498013245 110% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
---------------------
Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 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.