Final answer:
The earliest period of human prehistory is known as the Stone Age because humans of this time used stone to make tools and weapons.
Step-by-step explanation:
The earliest period of human prehistory is known as the Stone Age because humans of this time used stone to make tools and weapons. The use of stone tools and weapons was a defining characteristic of this period. The Stone Age occurred before people began writing, so there are no written records from this time. However, remains of early humans are preserved in fossils, providing valuable insights into their way of life during this period.
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