The Chalcolithic period in Bihar represents a transition between a focus on stone and copper tools, hunting-gathering and agriculture, and nomadic and settled life.
The Chalcolithic period is a period of prehistory in which stone tools were used alongside copper tools. It is a transitional period between the Neolithic period, when stone tools were the only type of tool used, and the Bronze Age, when copper and bronze tools were the primary type of tool used.
The Chalcolithic period in Bihar is dated to between 2500 and 1500 BCE. During this period, there was a shift from a focus on hunting-gathering to a focus on agriculture. This shift was likely due to a number of factors, including climate change, population growth, and the development of new technologies.
The shift to agriculture led to a number of changes in the way people lived. People began to live in larger settlements, and they developed new technologies to support their agricultural lifestyle. These technologies included the development of irrigation systems, the domestication of animals, and the development of new crops.
The shift to agriculture also led to a change in the way people interacted with the environment. People began to clear forests and cultivate land, which had a significant impact on the environment.
The Chalcolithic period in Bihar was a time of significant change. There was a shift from a focus on hunting-gathering to a focus on agriculture, which led to a number of changes in the way people lived and interacted with the environment.
The other options are incorrect because they do not represent the full range of changes that occurred during the Chalcolithic period in Bihar.