The Ganga and its tributaries in Bihar support a diverse range of fish species important for:

The correct answer is: d) All of the above

The Ganga and its tributaries in Bihar support a diverse range of fish species important for commercial fishing, subsistence fishing, and aquaculture.

• Commercial fishing is the activity of catching fish for sale. It is a major source of income for many people in Bihar. The most common fish caught in the Ganga and its tributaries for commercial purposes are catfish, carp, and tilapia.
• Subsistence fishing is the activity of catching fish for personal consumption. It is a way of life for many people in rural areas of Bihar. The most common fish caught for subsistence purposes are carp, tilapia, and mudskippers.
• Aquaculture is the farming of fish. It is a growing industry in Bihar. The most common fish farmed in the state are carp, tilapia, and catfish.

The Ganga and its tributaries are home to a wide variety of fish species. These fish are important for the local economy and for the environment. They provide food for people and animals, and they help to keep the river clean.