Explanation: Lakshadweep is an archipelago located in the Laccadive Sea off the southwestern coast of India. It is composed of 36 coral atolls, which are ring-shaped coral reefs that encircle a lagoon. The formation of these atolls is a result of coral growth over submerged volcanic islands.
Coral reefs are complex ecosystems built by marine invertebrates known as corals. Corals are tiny animals that secrete a hard, calcium carbonate skeleton. Over time, as generations of corals grow and die, their skeletons accumulate to form the massive structures that we see as coral reefs. These reefs can grow to form islands, especially in tropical and subtropical regions where conditions are favorable for coral growth.
The process of atoll formation begins with the growth of coral reefs around a volcanic island. As the island gradually subsides due to geological processes, the coral continues to grow upwards towards the surface of the water. Eventually, the volcanic island may become completely submerged, leaving behind a ring of coral reef that encircles a central lagoon. This is the typical structure of an atoll.
In the case of Lakshadweep, the archipelago is entirely composed of such coral atolls. The islands are not formed by volcanic activity or plant growth, although both of these factors can play a role in the ecosystem of the islands. Plants can grow on the islands once they are formed, and volcanic activity may have been a part of the initial formation of the submerged islands around which the corals grew.
Understanding the formation of Lakshadweep is important for comprehending the unique geographical and ecological features of the region. The coral reefs not only form the landmasses but also support a rich and diverse marine ecosystem. This makes Lakshadweep a significant area for marine biodiversity and conservation efforts.
In summary, the correct answer is that Lakshadweep is formed by corals, which grow over submerged volcanic islands to form the coral atolls that make up the archipelago. This process highlights the intricate relationship between geological processes and biological growth in the formation of such unique geographical features.