There are exactly two great and major island groups of India’s physiography. They are located in the Bay of Bengal and the Arabian Sea. There are numerous small and large islands, some of which are volcanic in origin and some of which are coral in origin among the Islands of Andaman and Nicobar.Â
These islands’ coastlines feature coral deposits and beautiful beaches. They have equatorial vegetation and are subjected to convectional rainfall. These are mostly flat islands of India that rise only a few metres above sea level.
The city of Port Blair is known as the capital of this territory. The islands’ total land area is approximately 8,249 km2 (3,185 sq mi). The territory is divided into three districts: Nicobar, with Car Nicobar as its capital, South Andaman, with Port Blair as its capital, and North and Middle Andaman, with Mayabunder as its capital.
The Andaman and Nicobar Command, the Indian Armed Forces’ only tri-service geographical command, is based on the islands.
The Sentinelese people, an uncontacted tribe, also live on the Andaman Islands. The Sentinelese may be the only people known to have not advanced beyond a Paleolithic level of technology; however, this is debatable, as evidence of metalwork was discovered on their island.Â
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Majuli Island is located in the Indian state of Assam. It’s a large river island in the Brahmaputra. It is recognized as the biggest island in the world. Agriculture is the primary source of income for the people on the island. The island faces a serious ecological threat because of extensive soil erosion on its banks
 Sriharikota Island of India is located in the Nellore district of the state of Andhra Pradesh, between Pulicat Lake and the Bay of Bengal. Sriharikota is one of the Indian Space Research Organisation’s satellite launch facilities
​​Off the coast of Odisha lies Abdul Kalam Island. It is India’s most advanced missile testing facility. Long back, this island was named before an English Commandant whose name was Lieutenant Wheeler, named after an English commandant, Lieutenant Wheeler
Pamban Island is located in the Gulf of Mannar, between Sri Lanka and India, and is part of a district named Ramanathapuram in Tamil Nadu. Rameswaram Island is another name for this Island of India. Because the majority of Pamban Island is covered in white sand, it is not suitable for cultivation.
Diu Island is situated off the coast of Kathiawar. Diu Island is well-known for its historical fort and beautiful beaches
Sagar Island is located in the Bay of Bengal’s Ganga delta. It’s a big island. It is also a significant Hindu pilgrimage site
Halliday Island is part of the Sundarbans region and is located in the state of West Bengal. It is situated on the Malta River. It is also designated as a wildlife refuge
These islands are found in the state of Manipur. It is located within the Keibul Lamjao National Park. It is well-known for its Eld’s deer/Sangai
Island ecosystems also help to maintain ecosystem functions: they protect against natural disasters, promote nutrient cycling, and soil and sand formation, and help to regulate climate and diseases. However, island biodiversity is important for more than just island dwellers