Life in the Ganga - Brahmaputra basin - class-IX

Kolkata is situated on the banks of the Hooghly River, which is a distributary of the Ganga.

• The Brahmaputra is the broadest (most wide) river of India thus facilitates the formation of big islands. Majuli is the largest riverine island located in the Brahmaputra river in Assam hence it is the correct answer.
• The Ganges has a few islands in its delta regions like Sagar island
• No significant islands are found in Yamuna and Satluj.

Majuli, the world's largest river island, is located on the Brahmaputra River in the state of Assam, India.

The main occupation of the people of the Ganga-Brahmaputra basin is agriculture. This is because the rivers make the soil of the basin very fertile and also the climatic condition of that region is also favorable. 

The Kaziranga National Park is famous for the One Horned Rhinoceros. It is situated in Assam. In the year 1985, the park was declared as a World Heritage Site by UNESCO.

Kolkata is the capital of the Indian state of West Bengal. Located on the east bank of the Hooghly River approximately 80 kilometers (50 mi) west of the border with Bangladesh, it is the principal commercial, cultural, and educational center of East India, while the Port of Kolkata is India's oldest operating port and its sole major riverine port.

Bengal tiger is found in mangrove forests. The Sundarban delta is densely covered by mangrove forests and is one of the largest reserves for the Bengal tiger.

The main crop of the Ganga-Brahmaputra region is paddy. Because of the monsoon type of climate of the region, as well as fertile and rich alluvium soil, it is the best for the growth of the rice.

The main occupation of the people of the Ganga-Brahmaputra basin is agriculture. This is because the rivers make the soil of the basin very fertile and also the climatic condition of that region is favorable. 

The Ganges river dolphin or susu is a variety of dolphins found in the Ganga-Brahmaputra region. They are considered to be endangered because of human activities. 

Agra is the city that is not located on the banks of river Ganga. It is situated on the bank of river Yamuna, originating from ' Yamnotri' glacier in the uppermost region of lower Himalaya in Uttarakhand. It also the longest tributary of the Ganga river.

The presence of Susu (also called blind dolphin) in the Ganga-Brahmaputra river is an indication of the health of the river. The Ganges river dolphins can only live in freshwater and are essentially blind. The untreated industrial and urban wastes with a high amount of harmful chemicals are killing the species.