The diagram portrays the transition of tools used for cutting purposes in the Stone Age. The main similarity between the two tools is the shape in which it is designed almost like a tooth having one of the ends sharp and the other blunt. On observing the front view, the girth of the stone increases from the middle to the bottom, while it decreases as we move from the centre of the tool to its tip.
It is clear from the front view that the equipment used about 1.4 million years ago is much leaner when compared to the equipment used about 0.8 million years ago. However, the side view portrays a different picture. Tool A seems to have more depth and therefore more blunt than Tool B. Additionally, the back view depicts the shape of each of the tool. While Tool A is more trapezoidal, Tool B is seen to be pear-shaped.
In summary, it is evident that the Tool B is more sharper in contrast to Tool A which is blunt. Moreover, Tool B appears to be more polished and likely to have a stronger grip since it is compact in width.