The diagram below shows the development of cutting tools in Stone Age. Summarize the information by selecting and reporting the main features, and make comparisons where relevant

The diagrams illustrate the evolution of the

tool

used for cutting in the Stone Age from

Tool

A (1.4 million years ago) to

Tool

B (0.8 million years ago).

Overall

, the latter version became noticeably larger in size and featured a more refined appearance. It can be observed that

Tool

A had no clear shape with a large base tapering towards the top and measured at around 7 cm in length, 3 cm in width with a thickness of approximately 2.5 cm. From the side view, the edges appeared to be rough and blunt.

Besides

, the front and back views of

this

tool

showed similar uneven surfaces that had many large random cuts.

In contrast

,

Tool

B, after 0.6 million years, had a more defined teardrop shape and was significantly larger than

tool

Capitalize word

Tool

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A. Both the front and back views revealed that the edges of

tool

B were smoother, and the tip was sharper than its prior version, increasing the effectiveness of the cutting instrument.

This

latter version

also

had less surface roughness compared to the previous one.