Correct Option A.
Original and Correct sentence:
The continental United States
receives an average of 30 inches of precipitation a year
;transpiration (
from soil and from plants) returns approximately 21 of the 30 inches to the atmosphere, while
the balance of 9 inches
contributes to (
the flow of streams and rivers).
- Majority of SC with semicolon and with two correct Independent clause, are always
correct, precautions, others can also be true, kindly do not ignore them.
(B)
even though transpiration from soil and from plants returns approximately 21 of the 30 inches to the atmosphere,
the remainder of 9 inches contribute to the
flowing-
Flaws *
Even though - used to indicate contrast between cause, Not reguired for intended meaning of the sentence
*
The reminder - apart from Maths division rule, normally it means as "something calls a memory of thoughts for mind" - creates contrast meaning for one, who has no relevance to it.
*
Flowing - present participle of verb "Flow", (contribute to
flowing of streams and river - has error with intended meaning)
(C)
although transpiration from soil and from plants return approximately 21 of the 30 inches to the atmosphere, the balance of 9 inches contribute to the
flowing-
Flaws *
although - used to indicate contrast between cause, Not reguired for intended meaning of the sentence
*
Flowing - present participle of verb "Flow", (contribute to
flowing of streams and river - has error with intended meaning)
(D)
with transpiration from soil and from plants
to return approximately 21 inches to the atmosphere, the rest of the 9 inches contributes to the flow
Flaw :
*With - usage is for additional to something or along something
*To return - prepositional phrase
* As
nouns-
balance is (uncountable) a state in which opposing forces harmonise
-
rest is (uncountable|of a person or animal) relief from work or activity by sleeping; sleep or rest can be (uncountable) that which remains.
As
verbs-
balance is to make (items) weigh up
-
rest is to cease from action, motion, work, or performance of any kind; stop; desist; be without motion or rest can be (obsolete) to remain.
(E) as transpiration from soil and from plants return approximately 21 of the 30 inches to the atmosphere, the rest of the 9 inches contribute to the flow
Flaw - usage of "As" is a degree of comparison for one to another
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