Final answer:
The biface tool, known as the Acheulian Swiss army knife, served multiple purposes for early humans, including hunting, chopping, scraping, and piercing.
Step-by-step explanation:
The biface tool, also known as the Acheulian Swiss army knife, served a variety of purposes for early humans. These tools were primarily used as a hunter's knife, but they were also utilized for chopping, scraping, and even piercing. The biface had two faces - one end was tapered, while the other was rounded. This versatile tool allowed hominins to have a better grip and perform various tasks efficiently.