The correct answer is option 'D'.

Explanation:
The agency working for the development of shrimp culture for the farmers is the Brackish Water Fish Farmers Development Agency. Here is a detailed explanation of the agency and its role in shrimp culture development:

Brackish Water Fish Farmers Development Agency (BWFFDA):
- The Brackish Water Fish Farmers Development Agency is an agency that works under the Department of Fisheries, Government of India.
- Its main objective is to promote the development of brackish water aquaculture, including shrimp culture, in the coastal regions of India.
- The agency aims to provide technical guidance, training, and financial assistance to the farmers engaged in brackish water aquaculture.
- It also works towards the development of infrastructure, such as construction of ponds, installation of aeration systems, and provision of hatcheries and nurseries for the farmers.
- The agency conducts research and development activities to improve the productivity and profitability of shrimp culture.
- It also helps in the dissemination of knowledge and technology related to shrimp culture through training programs, workshops, and seminars.
- The agency collaborates with various research institutes, universities, and other government agencies to promote sustainable and eco-friendly practices in shrimp culture.
- It also provides market linkages and support for the marketing of shrimp and other aquaculture products.

Importance of Brackish Water Fish Farmers Development Agency:
- Shrimp culture is an important economic activity in the coastal regions of India, providing livelihoods to thousands of farmers.
- The Brackish Water Fish Farmers Development Agency plays a crucial role in supporting and promoting the development of shrimp culture.
- By providing technical guidance, training, and financial assistance, the agency helps in improving the skills and knowledge of the farmers, thereby enhancing their productivity and income levels.
- The agency's efforts in infrastructure development and research and development activities contribute to the overall growth and sustainability of shrimp culture in the country.
- Through its market linkages and support, the agency helps in creating better market opportunities for shrimp farmers, ensuring better prices and profitability.

In conclusion, the Brackish Water Fish Farmers Development Agency is the agency working for the development of shrimp culture for the farmers. Its efforts in providing technical guidance, training, financial assistance, and market support are crucial for the growth and sustainability of shrimp culture in the coastal regions of India.