Explanations:
The question asks which of the given options is a group of coral islands. To understand the answer, it is essential to know the geographical characteristics of the islands in question. Coral islands are formed by the accumulation of coral reefs, which are made up of the skeletons of tiny marine animals called coral polyps. Over time, these skeletons build up to form a solid structure that can eventually become an island.
Lakshadweep, the correct answer, is a group of islands located in the Laccadive Sea off the southwestern coast of India. It is the smallest Union Territory of India and is composed of 36 coral atolls, islands, and islets. The islands are formed by coral reefs, which have grown up from the sea floor over thousands of years. The coral reefs provide a unique ecosystem that supports a wide variety of marine life and contributes to the biodiversity of the region.
In contrast, the Andaman and Nicobar Islands, which are also located in the Bay of Bengal, are not primarily coral islands. The Andaman Islands are part of a volcanic and tectonic chain, while the Nicobar Islands are also volcanic in origin. These islands are formed by different geological processes and do not have the same coral reef structure as Lakshadweep.
Understanding the formation and characteristics of coral islands is crucial for identifying them correctly. Coral islands are typically found in tropical and subtropical regions where the water is warm and clear, allowing coral polyps to thrive. The process of coral island formation is a slow and continuous one, with the coral reefs gradually building up over time to form the islands. This process is influenced by various factors, including water temperature, salinity, and the availability of nutrients.
In summary, Lakshadweep is the correct answer because it is a group of coral islands formed by the accumulation of coral reefs. The other options, Andaman and Nicobar Islands, are not primarily coral islands and are formed by different geological processes. Understanding the geographical and geological characteristics of these islands is essential for correctly identifying them.