The Teri sites in southern Tamil Nadu are known for their:

Rock-cut caves
Megalithic burials
Microlithic tools
Temple architecture

The correct answer is: b) Megalithic burials.

Megalithic burials are a type of burial that is characterized by the use of large stones. These stones are often used to construct a chamber or mound that houses the remains of the deceased. Megalithic burials are found in many parts of the world, and they date back to the Neolithic period.

The Teri sites in southern Tamil Nadu are known for their megalithic burials. These burials are typically found in clusters, and they often contain a variety of grave goods, including pottery, tools, and ornaments. The Teri sites are important because they provide evidence of the early cultures of southern India.

The other options are incorrect because:

  • Rock-cut caves are not found at the Teri sites.
  • Microlithic tools are small, stone tools that were used by early humans. These tools are not found at the Teri sites.
  • Temple architecture is not found at the Teri sites.