Improve the bracketed part of the sentence.
The mosquito which spreads chikungunya and dengue (breeds on) fresh water.

Correct option is B

· Correct answer: (b) breeds in
· Grammatical Rule: Correct Preposition with "Breed"
· "Breed in" is the correct phrase because mosquitoes lay eggs and reproduce in water, not on it.
· Incorrect: "breeds on fresh water" → Correct: "breeds in fresh water"
· Correct sentence: The mosquito which spreads chikungunya and dengue breeds in fresh water.
· Example Sentence: Bacteria breed in warm and moist environments.