The prehistoric site of Chechar in Bihar is known for its:

Stone tools
Copper objects
Rock paintings
Evidence of housing

The prehistoric site of Chechar in Bihar is known for its stone tools. These tools were made by early humans and are used for a variety of purposes, such as hunting, gathering, and preparing food. The tools are made from a variety of materials, including stone, bone, and wood. They are often found in association with other artifacts, such as animal bones and plant remains. The tools provide valuable information about the lives of early humans and their environment.

Copper objects are not found at the prehistoric site of Chechar in Bihar. Copper is a metal that was not used until much later in human history. The first copper objects were made around 5,000 years ago.

Rock paintings are also not found at the prehistoric site of Chechar in Bihar. Rock paintings are images that were created by early humans on rocks. They are often found in caves or other sheltered areas. Rock paintings provide valuable information about the lives of early humans and their beliefs.

Evidence of housing is also not found at the prehistoric site of Chechar in Bihar. Early humans did not build permanent houses. They lived in temporary shelters, such as tents or huts. The first permanent houses were built around 10,000 years ago.

In conclusion, the prehistoric site of Chechar in Bihar is known for its stone tools. These tools provide valuable information about the lives of early humans and their environment.