The Andaman and Nicobar Islands are submerged parts of a mountain range called Arakan Yoma.

The Andaman and Nicobar Islands are a group of islands located in the Bay of Bengal. They are considered one of the Union Territories of India. These islands are known for their pristine beaches, rich biodiversity, and unique indigenous cultures.

The islands are not just ordinary landmasses but are actually the peaks of a submerged mountain range. These mountains are called the Arakan Yoma. The Arakan Yoma is a mountain range that stretches from the eastern part of Bangladesh through Myanmar and extends into the Andaman Sea.

Submerged parts of the Arakan Yoma:
- The Andaman and Nicobar Islands are the submerged parts of the Arakan Yoma mountain range. This means that only the highest peaks of the range are visible as islands, while the rest of the mountains are submerged underwater.
- The islands are actually the tips of the submerged mountains that rise above the surface of the sea.
- The islands are scattered across a wide area and are divided into two main groups - the Andaman Islands and the Nicobar Islands.

Geological significance:
- The fact that the Andaman and Nicobar Islands are submerged parts of the Arakan Yoma mountain range holds great geological significance. It suggests that these islands were once connected to the mainland before being separated due to geological processes.
- The separation of the islands from the mainland can be attributed to tectonic movements and the rising sea levels over millions of years.
- The Andaman and Nicobar Islands are located in a seismically active region and are prone to earthquakes and tsunamis.

Biodiversity:
- The islands' geological history as a submerged mountain range contributes to their rich biodiversity. The isolation and unique geological features have led to the evolution of numerous endemic species found nowhere else in the world.
- The islands are known for their diverse range of flora and fauna, including tropical rainforests, coral reefs, and various marine species.
- The Andaman and Nicobar Islands are also home to indigenous tribes who have inhabited these lands for centuries, preserving their unique cultures and traditions.

In conclusion, the Andaman and Nicobar Islands are the submerged parts of the Arakan Yoma mountain range. This geological phenomenon has contributed to the islands' unique biodiversity and cultural heritage.