The correct answer is: b) Megalithic burials.
Adichanallur is an important archaeological site in Tamil Nadu, India. It is located in the Tirunelveli district, about 100 kilometers from Madurai. The site is known for its megalithic burials, which date back to the Iron Age. The burials are characterized by large stone slabs that are arranged in a circular or rectangular shape. Inside the burials, archaeologists have found a variety of artifacts, including pottery, jewelry, and weapons.
The megalithic burials at Adichanallur are some of the earliest examples of this type of burial in India. They provide valuable insights into the culture and beliefs of the people who lived in this region during the Iron Age.
The other options are incorrect because:
- Paleolithic cave paintings are not found at Adichanallur.
- Iron Age settlements are found at other archaeological sites in Tamil Nadu, but not at Adichanallur.
- Chola-era temples are found in other parts of Tamil Nadu, but not at Adichanallur.