The diagram illustrate the development of cutting tools in the stone age. Above diagram is of Tool A which was created 1.4 milloin years ago while below diagram is of Tool B which was created 0.8 million year ago.
Tool A was unevenly carved and had blunt edge. It was shaped in such a manner that it had smaller width with thicker crust. This indicate that 1.4 million years age human civilization did not posses well functional tools and had problem hunting.
Tool B was more evenly carved and had sharper edges. Its shape was improved in comparison to Tool A and was pointed with thinner crust. This indicate that 0.8 million years ago human civilization were able to develop well functional tools for hunting.
In conclusion, the diagram illustrate how fast the human civilization advanced in a span of 0.6 million years and made well functional tools for hunting.
