INDIAN GEOGRAPHY

Detailed explanation-1: -An atoll is a ring-shaped coral reef, island, or series of islets. An atoll surrounds a body of water called a lagoon. Sometimes, atolls and lagoons protect a central island. Channels between islets connect a lagoon to the open ocean or sea.

Detailed explanation-2: -Atoll lagoons form when an island completely subsides beneath the water, leaving a ring of coral that continues to grow upwards. At the center of the ring is a body of water that is often deep. The combination of coral growth and water creates a lagoon.

Detailed explanation-3: -The correct answer is Lakshadweep. Lakshadweep Islands are made of small atolls and reefs in the Arabian Sea.