The diagram below shows the development of the cutting tool in the Stone Age.
The provided diagram depicts the evaluation of the cutting tool through Stone Age from 1.4 million to 0.8 million
Overall, it is apparent that due to the number of upgrades in shapes and sizes, the cutting instrument become more effectively for the human production activities.
In 1,4 million the front view of instrument looked extremely primitive and resembled a natural stone with little crafting. From front view, instrument tended to be an oval shape, rough surface and blunt edges that had a lower quality of version compared to Tool B being update.
In term of side view was likely to be smaller than other sides in two both tool A and Tool B. Before there was upgraded into a spear-shaped instrument with the tip and edges being much sharper, it had rendered this edge quite rudimentary 1,4 million ago. Despite the improvement, the back view remained unchanged their length 5 cm, while , the surface of Tool B was crafted to be smoother and the overall width to be larger. Therefore, these features rendered this version more superior in terms of cutting efficiency.