Tip :-
Always remember: whenever you have to chose between "because of" and "due to", replace "due to" by "caused by". If the sentence still makes sense, then it is correct else wrong. And yes, "capability to" is wrong here.
In B, "ability of reproducing" is unidiomatic.
INCORRECT: ability of doing X.
CORRECT: ability TO DO X.
Other errors in B:
"because" and "thus" are redundant.
Generally, COMMA + along with serves to refer to a preceding subject.
B: Because of many insect species' ability, along with producing
Here, no subject precedes COMMA + along with.
Eliminate B.
John attended, along with Mary.
Conveyed meaning:
Both JOHN and MARY attended.
C: Because they can reproduce yearly, along with producing offspring in large numbers
Conveyed meaning:
Both THEY and PRODUCING OFFSPRING IN LARGE NUMBERS can reproduce yearly.
'so' not required. change in meaning. parallelism issue
This meaning is nonsensical.
Eliminate C.
D: Due to their capability, many insect species
Conveyed meaning:
Many insect species are due to their capability.
This meaning is nonsensical.
each year is better than yearly . to produce can be llel to 'to their capa..' or 'to reproduce..'
Eliminate D.
E: Due to their ability, many insect species
Conveyed meaning:
Many insect species are due to their ability.
This meaning is nonsensical.
"ability of reproducing" is unidiomatic.
INCORRECT: ability of doing X.
CORRECT: ability TO DO X.
Eliminate E.
The correct answer is A.
The construction “due to” is an adjective that takes a prepositional phrase; the word “due” is a noun-modifier
By contrast, the construction “because of” is a verb modifier. verb modifiers target the action of a clause and are much freer in their placement than are noun modifiers, “because of” correctly can be used anywhere in the clause and it can directly modify the action of the clause.
example : the game was cancelled(verb), due to rain - incorrect
the game was cancelled, because of rain - correct
the cancellation(noun) of the game was because of rain - incorrect as in this case cancellation is the noun
the cancellation (noun)of the game was due to rain -correct
verb is preferred over adjectives or nouns.
can is preferred over capability