Correct Answer: Gambusia fish

Solution : The correct answer is Gambusia fish.

Gambusia fish or Gambusia affinis is a freshwater fish which is native to North America. It feeds on the larvae of mosquito which helps to control the growing mosquito population. They are larvivorous fish which helps in the biological control of mosquitoes. They are also known as topminnow.

Mosquito acts as a vector for various diseases like Zika virus, West Nile Virus, Chikungunya Virus, Dengue, Malaria etc.