The correct answer is: c) Neolithic.
The Neolithic period is the final stage of the Stone Age, when humans began to use polished stone tools and domesticated animals. This period is characterized by the development of agriculture, which led to a more settled lifestyle and the rise of complex societies.
The Paleolithic period is the earliest period of the Stone Age, when humans used unpolished stone tools. This period is characterized by a hunter-gatherer lifestyle and the use of simple tools.
The Mesolithic period is the middle period of the Stone Age, when humans began to use polished stone tools. This period is characterized by a transition from a hunter-gatherer lifestyle to a more settled lifestyle.
The Chalcolithic period is the period of transition between the Stone Age and the Bronze Age, when humans began to use copper tools. This period is characterized by the development of metallurgy and the rise of complex societies.
In Manipur, the Neolithic period is characterized by the use of polished stone axes and adzes. These tools were used for a variety of purposes, including agriculture, hunting, and warfare. The Neolithic period in Manipur is also characterized by the development of pottery and the construction of megalithic monuments.