The correct answer is: a) Appearance of microliths.
Microliths are small stone tools that were used during the Mesolithic period. They are made by chipping away at a larger piece of stone until it is the desired size and shape. Microliths were used for a variety of purposes, including hunting, fishing, and woodworking.
The Mesolithic period is a period of human history that lasted from about 10,000 to 5,000 years ago. It is the period between the Paleolithic period, when humans were hunter-gatherers, and the Neolithic period, when humans began to farm. The Mesolithic period is characterized by the development of new technologies, such as the use of microliths, and by changes in human lifestyles.
The development of agriculture is not associated with the transition from the Paleolithic to the Mesolithic period. Agriculture began in the Neolithic period, after the development of microliths.
The domestication of animals is also not associated with the transition from the Paleolithic to the Mesolithic period. Animals were domesticated in the Neolithic period, after the development of agriculture.
The construction of megaliths is not associated with the transition from the Paleolithic to the Mesolithic period. Megaliths are large stone structures that were built in the Neolithic period.
In conclusion, the correct answer to the question “The transition from the Paleolithic to the Mesolithic Period is marked by:” is a) Appearance of microliths.