Aquaculture is a growing sector in Bihar, primarily focused on:

Carp farming
Shrimp farming
Seaweed cultivation
Ornamental fish breeding

The correct answer is: a) Carp farming.

Bihar is a landlocked state in India, and as such, does not have access to the sea. This means that aquaculture in Bihar is focused on freshwater fish farming, and carp are the most popular type of fish farmed in the state. Carp are a hardy and adaptable species that can tolerate a wide range of water conditions, making them ideal for farming in Bihar’s rivers and ponds.

Shrimp farming is also a growing sector in Bihar, but it is not as widespread as carp farming. Shrimp are a popular seafood item, and the demand for them is increasing. However, shrimp farming is more intensive than carp farming, and it requires more specialized equipment and expertise.

Seaweed cultivation is not a major industry in Bihar, but there is some potential for growth in this area. Seaweed is a valuable resource that can be used for a variety of purposes, including food, fertilizer, and biofuel. Bihar has a long coastline, and the state’s waters are well-suited for seaweed cultivation.

Ornamental fish breeding is a small but growing industry in Bihar. Ornamental fish are popular pets, and the demand for them is increasing. However, the breeding of ornamental fish is a specialized activity, and it requires a lot of knowledge and experience.

In conclusion, the correct answer to the question “Aquaculture is a growing sector in Bihar, primarily focused on: a) Carp farming b) Shrimp farming c) Seaweed cultivation d) Ornamental fish breeding” is a) Carp farming.