The correct answer is a) Shrimp.
Aquaculture is the farming of aquatic organisms including fish, molluscs, crustaceans, algae and aquatic plants. Aquaculture can be contrasted with commercial fishing, which is the harvesting of wild fish. Aquaculture is a rapidly growing industry, and is now the primary source of fish for human consumption in many parts of the world.
In Kerala, aquaculture is a major economic activity, and the state is one of the leading producers of shrimp in India. The shrimp farming industry in Kerala is based on the culture of black tiger shrimp (Penaeus monodon). Black tiger shrimp are a tropical species that are native to the Indo-Pacific region. They are a highly prized food fish, and are exported to many countries around the world.
The shrimp farming industry in Kerala is facing a number of challenges, including the spread of disease, the use of harmful chemicals, and the destruction of mangrove forests. However, the industry is also taking steps to address these challenges, and is working to develop sustainable practices.
The other options are incorrect because they are not the primary focus of aquaculture in Kerala. Carp are a type of freshwater fish that are popular in aquaculture, but they are not as important in Kerala as shrimp. Catfish are another type of freshwater fish that are farmed, but they are not as important in Kerala as shrimp. Mussels are a type of shellfish that are farmed, but they are not as important in Kerala as shrimp.