Final answer:
The beginning of the Neolithic Age was marked by the adoption of agriculture and the domestication of animals. These discoveries came about through observation, experimentation, and intentional planting and breeding.
Step-by-step explanation:
The beginning of the Neolithic Age was marked by several key discoveries. These discoveries included the adoption of agriculture and the domestication of animals, which allowed for larger populations and the transition from a hunter-gatherer lifestyle to a settled agricultural lifestyle. The use of sophisticated stone tools, such as grinding tools, chopping tools, and cutting tools, also characterized this period.
These discoveries did not happen all at once but gradually over time. People began to realize that they could cultivate crops and raise animals for food, which provided a more reliable and stable food supply. This discovery came about through observation and experimentation. Early humans noticed that certain plants grew naturally in certain areas and that animals could be tamed and bred for food. They started to intentionally plant seeds and raise animals, leading to the development of agriculture and the Neolithic Age.