what are corals?give there significant importance for releaf feature of india
Answers
I would give direct answer which is given at last page on geography class 9 ch2 last page
The tubular skeletons grow upwards and outwards as a cemented calcareous rocky mass, collectively called corals.
Lakswadeep island
The basic coral reef classification scheme described above was first proposed by Charles Darwin, and is still widely used today.
Darwin theorized that fringing reefs began to grow near the shorelines of new islands as ecological conditions became ideal for hard coral growth.
Then, as the island began to gradually subside into the sea, the coral was able to keep pace in terms of growth and remained in place at the sea surface, but farther from shore; it was now a barrier reef.
Eventually, the island disappeared below the sea surface, leaving only the ring of coral encircling the central lagoon; an atoll had formed.