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Considered to be the most densely populated country in the world, Bangladesh is situated on large, low-lying river deltas, flowing from the Himalayas into the Bay of Bengal. The Ganges delta, known as the Padma, joins two other rivers before finally filtering out into the ocean. With low elevations, Bangladesh is subject to severe flooding and is now recognized as vulnerable to climate change
The state of West Bengal is situated on the eastern bottleneck of India. The Ganges River divides in into the Hooghly River in West Bengal and the Padma River flowing southeast into Bangladesh. Calcutta is considered the cultural capital of India and the birthplace of modern Indian literature and art. West Bengal shares much of its cultural heritage with the neighboring Bangladesh.
In traditional Indian culture, social status is defined by the caste system. It is a strict hierarchy that assigns social standing based on hereditary descendants. Under this system Indians are literally born into their social status. Modern India has done much to combat caste-based discrimination, but in rural areas it is still very much a visible part of life.
With a population of over 100 million, Bihar is India's third most populous state. In ancient times, the area was considered the country's centre of power, learning, and culture. Today, slow economic development has led Bihar to becoming India's poorest state. The state has a reputation for crime and inter-caste violence. Foreigners are warned to exercise extreme caution while traveling in Bihar.