The correct answer is: a) Early nomadic hunter-gatherers.
Hand axes and other stone tools are typically associated with early nomadic hunter-gatherers. These tools were used for a variety of purposes, including hunting, butchering, and processing food. The discovery of these tools in Meghalaya suggests that the area was once home to early nomadic hunter-gatherers.
Settler agricultural communities typically develop after the invention of agriculture. Agriculture allows people to produce their own food, which leads to a more settled lifestyle. Early trade routes typically develop after the invention of money. Money allows people to trade goods and services more easily, which leads to the development of trade routes. Bronze Age culture typically develops after the invention of bronze. Bronze is a type of metal that is stronger than stone, which allows people to make more sophisticated tools and weapons.
In conclusion, the discovery of hand axes and other stone tools in Meghalaya suggests the presence of early nomadic hunter-gatherers.