Question

Lakshadweep Islands are the product of ______________.
(A) Volcanic activity
(B) Wave action
(C) Sea-floor expansion
(D) Reef formation

Answer 1

Hint: It begins to form at the time when free-swimming coral larvae get attached to submerged rocks or other hard surfaces along with the edges of islands or continents. Major characteristic structures of these are— fringing, barrier or atoll.

Complete answer:
Lakshadweep is a tropical archipelago of 36 atolls as well as coral reefs in the Laccadive Sea, off the coast of Kerala, India. Lakshadweep Islands are characterized by their small size as well as distance from the mainland shore.All of these islands are built of coral reefs from the late Tertiary period, and are surrounded by coral reefs with the deep sea toward the east and lagoon on the western side.
Anyhow, Lakshadweep is the one and only coral island chain present in India. These islands had been formed by the accumulation of coral on the volcanic tops of the Indian Ocean ridge that sank below the surface around millions of years ago presumably because of a rise in sea levels.
Thus, Lakshadweep Islands are known as the product of Reef formation. Lakshadweep refers to an archipelago of twelve atolls, three reefs as well as five submerged banks, along with a sum of about thirty-nine islands and islets. The reefs are in fact also atolls, although mostly submerged, with only small unvegetated sand cays above the high-water mark. The submerged banks are referred to as sunken atolls. Mostly all the atolls have a northeast–southwest orientation along with the islands lying on the eastern rim, and a which is mostly submerged reef on the western rim, enclosing a lagoon. It consists of about ten inhabited islands, a total of 17 uninhabited islands, attached islets, four newly formed islets and lastly five submerged reefs.

Thus, Option D is the correct answer.

Note:
Lakshadweep refers to an archipelago which consists of 36 islands having an area of 32 sq km. It has a uni-district Union Territory and is made of 12 atolls, three reefs, five submerged banks and lastly ten inhabited islands.