The correct answer is: a) Fish production.
The ‘Ghare Ghare Pukhuri, Ghare Ghare Maach’ scheme aims to boost fish production by encouraging people to build small ponds in their backyards. This will increase the availability of fish, which is a good source of protein, and will also help to improve the livelihoods of people living in rural areas.
Option b) Irrigation is incorrect because the scheme does not focus on increasing the amount of water available for irrigation.
Option c) Drinking water supply is incorrect because the scheme does not focus on increasing the amount of drinking water available.
Option d) Tourism is incorrect because the scheme does not focus on increasing the number of tourists visiting the area.