Question

Like ants, termites have an elaborate social structure in which a few individuals reproduce and the rest are serving the colony by tending juveniles, gathering food, building the nest, or they battle intruders.

• A. are serving the colony by tending juveniles, gathering food, building the nest, or they battle
• B. are serving the colony in that they tend juveniles, gather food, build the nest, or battle
• C. serve the colony, tending juveniles, gathering food, building the nest, or by battling
• D. serve the colony by tending juveniles, gathering food, by building the nest, or by battling
• E. serve the colony by tending juveniles, gathering food, building the nest, or battling
  

Answer 1

The correct option is E serve the colony by tending juveniles, gathering food, building the nest, or battling


The answer will be "E".
It is a simple case of Parallelism.
Option A and Option B are out as there is no Parallelism between "a few individuals reproduce and the rest are serving".
Options C, D and E correct the above error but Option C and D shows no Parallelism later in the sentence by using "or by battling".