The correct answer is B. Microliths, small stone blades, are associated with the Mesolithic period.
The Mesolithic period is a sub-period of the Stone Age, traditionally dated to extend from 10,000 years ago to 5,000 years ago, although some experts prefer the alternative dates of 8,000 to 6,000 years ago. The Mesolithic period is the transitional period between the Paleolithic and Neolithic periods in the development of human technology. It is characterized by the development of microliths, small stone blades that were used in a variety of tools. Microliths were first developed in Africa around 10,000 years ago, and they spread to other parts of the world over the next few thousand years.
Microliths were used in a variety of tools, including knives, arrowheads, and fishhooks. They were also used to make jewelry and other decorative items. Microliths were an important part of the Mesolithic toolkit, and they played a significant role in the development of human technology.
The other options are incorrect. The Lower Paleolithic period is the first sub-period of the Stone Age, traditionally dated to extend from 2.58 million years ago to 300,000 years ago. The Neolithic period is the final sub-period of the Stone Age, traditionally dated to extend from 10,000 years ago to 4,500 years ago. The Chalcolithic period is the transitional period between the Neolithic and Bronze Age in the development of human technology. It is characterized by the development of copper metallurgy.