Question

Which of the following describes “Atoll”?
A. They are rectangular coral
B. They are circular and horse-shoe shaped coral reefs
C. They are triangular shaped coral reefs
D. None of the above

Answer 1

Hint:•These are uninhabited remote locations generally immaculate and unexplored by people, albeit some develop past short reef arrangements, framing generous landmass.
•It starts as a reef encompassing a gradually dying down island, typically volcanic. As the island sinks, the coral keeps on developing upwards until ultimately the island is underneath ocean level and just a ring of coral is left at the surface.

Complete answer:
A coral reef developed around the shore of the fountain of liquid magma and afterward, more than a few million years, the spring of gushing lava went wiped out and dissolved and died down totally underneath the outside of the sea.
By and large, the land zone of an atoll is little in contrast with the absolute region.
Atolls range in size from little to those so wide that the coral reefs on the far side can't be seen over the tidal pond. Atoll widths range from about 2.5 to almost 100 km, yet the mean worth is around 20 km.
A) There are multiple types of rectangular coral reefs. Some examples of them are sores, Venezia etc. Option (A) is not the correct answer.
B) Atolls are formed from the remnant parts of sinking volcanic islands. And they generally form closed circular or horse-shoe type structures. Option (B) is the correct answer.
C) The triangular coral reefs are called Carole. Option (C) is also not correct.
D) Option (D) cannot be the right answer. Because one of the above options is right.

Hence the correct answer is option B.

Note:All land over the surface in the Maldives is of coralline birthplace. The atolls of the Maldives structure a very standard chain and, particularly in the northern and focal atolls, a shown structure is clear. The regular atoll was initially shaped as a maritime well of lava.
Lihou is the biggest raised coral atoll of the world with 1,146 square kilometres trailed by Rannell Island with 660 square kilometres. Atoll islands are low lying, with their heights under 5 meters (16.5 feet).