In Scotland,
the number of wild salmon have been reduced because of uncontrolled deep-sea and coastal netting, by pollution, and by various other threats to the fish’s habitat.
Meaning Analysis: In Scotland the wild salmon population has reduced. The causes for this reduction are (1) Uncontrolled deep-sea and coastal netting (2) pollution and (3) other threats to the salmon fish's habitat.
Sentence Structure: In Scotland,
(Prepositional phrase modifying the following noun "the number")the number
(Singular subject)of wild salmon
("wild salmon" is in a prepositional phrase hence not a subject)have been reduced
(plural verb to singular subject)because of
(contextual word indicating reason of some event)uncontrolled deep-sea and coastal netting
(element 1 of parallelism), by pollution
(element 2 of parallelism), and
(parallelism marker)by various other threats to the fish’s habitat.
(element 3 of parallelism)Quote:
A. number of wild salmon have been reduced because of uncontrolled deep-sea and coastal netting
We have a clear SV agreement error. The singular subject "number" is given a plural verb "have been". This error is a deterministic error.
Moreover, we see that the three elements are not parallel to each other. The last two elements in the non-underlined part are prepositional phrases beginning with "by" while the first element in the underlined part is a compound noun. "deep-sea and coastal netting" is a compound noun in which "uncontrolled" is a modifier modifying this noun entity.
Quote:
B. number of wild salmon is reduced because deep-sea and coastal netting is not controlled
"The number" is given a singular verb "is" thus rectifying the SV agreement error. However the parallelism error still exists. While the first element
"deep-sea and coastal netting is not controlled" is a clause the other two elements are prepositional phrases.
We also notice a new SV agreement error out here. "deep-sea and coastal netting" is a compound noun and this "plural noun" is given a singular verb "is". This error is a deterministic error.
Quote:
C. numbers of wild salmon has been reduced because of uncontrolled deep-sea and coastal netting
Notice the subject "numbers" is plural and so we need a plural verb "have been" BUT here we see a singular verb "has been" leading to a SV agreement error.
The parallelism error still exists. The first is element is a compound noun while the other two elements are prepositional phrases.
Quote:
D. wild salmon’s numbers are reduced by deep-sea and coastal netting that is not controlled
I can't really point out the grammar errors out here BUT surely this sentence is not well structured. "Numbers" surely is plural and hence the plural verb "are is correct" However, I am not happy with "Salmon's number". A much better way to say this is by stating "the number of Salmons"
In terms of parallelism, the first element is indeed a prepositional phrase "by deep-sea and coastal netting" thus making the structure of this element parallel to the structure of the other two elements. However, the modifier "that is not controlled" makes this structure inferior. A much better way to say this would be "uncontrolled deep-sea and coastal netting"
I believe it is alright to use simple present tense "are reduced" out here. Don't think that there is any meaning change out here.
Quote:
E. wild salmon’s numbers have been reduced by uncontrolled deep-sea and coastal netting
Correct. All SV errors and parallelism errors are rectified.
Correct Choice:
(E) Learning:-
1. A subject cannot lie in a prepositional phrase: Hence "wild salmon" is not the subject"
2. ",FANBOYS" can be used despite the absence of two ICs: Hence we see ",and" used as a parallelism marker between the three supposedly parallel elements.
3. A compound noun is a group of nouns connected by "and" thus making this entire noun entity plural: E.g.
Hoozan and Ron are eating the cake. Though "Hoozan" and "Ron" are both singular, the connector "and" makes this a compound noun
(plural noun)