The correct answer is: a) Stalactites and stalagmites.
Belum Caves are a group of natural caves located in Kurnool district of Andhra Pradesh, India. The caves are known for their stalactites and stalagmites, which are formed by the dripping of water over a long period of time. The caves are also home to a variety of bats and other animals.
Stalactites are formed when water containing dissolved minerals drips from the ceiling of a cave. The minerals in the water precipitate out as the water evaporates, leaving behind a deposit that forms a cone-shaped structure. Stalagmites are formed in a similar way, but they grow upwards from the floor of the cave.
The Belum Caves are a popular tourist destination, and they are also a valuable scientific resource. The caves provide insights into the geological history of the region, and they are also home to a variety of plant and animal life.
The other options are incorrect because:
- Prehistoric rock art is not found in the Belum Caves.
- Buddhist sculptures are not found in the Belum Caves.
- Medieval inscriptions are not found in the Belum Caves.