Explanations:The eastern part of the Indian Subcontinent is a region rich in diverse geographic features, including river deltas and mangrove swamps. The Brahmaputra River, one of the major rivers in the region, forms a significant delta as it flows into the Bay of Bengal. This delta is located primarily in the state of Assam in India and extends into Bangladesh. The delta is characterized by its vast network of distributaries and is an important ecological and agricultural region.
Another prominent geographic feature in the eastern part of the Indian Subcontinent is the mangrove swamps, most notably the Sundarbans. The Sundarbans is a vast mangrove forest that spans parts of West Bengal in India and Bangladesh. It is the largest mangrove forest in the world and is known for its unique ecosystem, which includes a variety of flora and fauna, including the Bengal tiger. The mangrove swamps are crucial for protecting the coastal areas from erosion and storm surges, and they also serve as important habitats for various species.
Both the delta of the Brahmaputra River and the mangrove swamps are significant geographic features that are found in the eastern part of the Indian Subcontinent. These features are not only important from an ecological perspective but also play a crucial role in the socio-economic activities of the region. The delta provides fertile land for agriculture, while the mangrove swamps are important for fishing and other coastal activities.
Therefore, the correct answer is that both the delta of the Brahmaputra River and the mangrove swamps are found in the eastern part of the Indian Subcontinent. This makes option C the correct choice.