The correct answer is: B) Mesolithic Age
Microliths are small, thin stone tools that were used during the Mesolithic Age. They were made by flaking a larger stone into many small pieces, which were then used to make a variety of tools, such as arrowheads, knives, and scrapers.
The Mesolithic Age was a time of transition between the Paleolithic Age and the Neolithic Age. During the Paleolithic Age, humans were hunter-gatherers who lived in small groups. They used simple tools made of stone, bone, and wood. The Neolithic Age was a time of change, when humans began to farm and live in larger communities. They also began to make more complex tools, such as pottery and metal tools.
The presence of microliths indicates a transition to the Mesolithic Age because they are a type of tool that was not used during the Paleolithic Age. Microliths were first used during the Mesolithic Age, and they continued to be used into the Neolithic Age.
The other options are incorrect because they do not correspond to the time period when microliths were first used. The Paleolithic Age was a time before microliths were used, the Bronze Age was a time after microliths were no longer used, and the Iron Age was a time when microliths were not used at all.