Read the following Assertion and Reason and choose the correct option. Assertion: Gambusia fish are introduced in ponds to control mosquito-borne diseases. Reason: Gambusia fish feed on mosquito larvae, reducing the population of mosquitoes and thereby controlling diseases like malaria.

Step-by-step solution

For diseases such as malaria and filariasis that are transmitted through insect vectors, the most important measure is to control or eliminate the vectors and their breeding places. This can be achieved by avoiding stagnation of water in and around residential areas, regular cleaning of household coolers, use of mosquito nets, introducing fishes like Gambusia in ponds that feed on mosquito larvae, spraying of insecticides in ditches, drainage areas and swamps, etc. In addition, doors and windows should be provided