The correct answer is: a) Freshwater aquaculture.
Assam is a state in northeastern India. It is known for its rich biodiversity, including its many freshwater fish species. The state has a long history of aquaculture, and its farmers are skilled in raising a variety of fish, including carp, catfish, and tilapia. Freshwater aquaculture is an important part of the state’s economy, and it provides employment for many people.
Option b, marine fisheries, is incorrect because Assam is a landlocked state and does not have access to the ocean. Option c, ornamental fish rearing, is incorrect because Assam is not known for its ornamental fish industry. Option d, pearl culture, is incorrect because Assam does not have a significant pearl culture industry.
In conclusion, the correct answer to the question “Assam has a rich tradition in: a) Freshwater aquaculture b) Marine fisheries c) Ornamental fish rearing d) Pearl culture” is a) Freshwater aquaculture.