Explanation: The Sunderbans is a unique and significant geographical feature located in the delta region of the Ganges, Brahmaputra, and Meghna rivers. It is the largest mangrove forest in the world and is known for its rich biodiversity, including the Bengal tiger. The Sunderbans is divided between India and Bangladesh, with the Indian part being a part of the state of West Bengal.
In West Bengal, the Sunderbans is primarily located in the South 24 Parganas district. This district is situated in the southern part of the state and is known for its vast mangrove forests, which are a UNESCO World Heritage site. The South 24 Parganas district is not only home to the Sunderbans but also includes other important areas such as the Sagar Island and the Ganga Sagar.
The Sunderbans is a critical ecosystem that supports a wide range of flora and fauna. It is also an important habitat for the Bengal tiger, which is the national animal of India. The mangrove forests of the Sunderbans play a crucial role in protecting the coastal areas from cyclones and tidal surges, which are common in the region.
The other options provided in the question are incorrect for the following reasons:
- Digha, which is in the East Midnapore district, is known for its beaches and is not associated with the Sunderbans.
- Kolkata, the capital city of West Bengal, is located in the northern part of the state and is not in the Sunderbans region.
- North 24 Parganas, while it is a district in West Bengal, does not contain the whole Indian part of the Sunderbans delta.
Understanding the geographical distribution of the Sunderbans is important for comprehending the ecological and administrative aspects of West Bengal. The South 24 Parganas district is a key area for conservation efforts and tourism related to the Sunderbans, making it a significant part of West Bengal's geography and natural heritage.