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 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
show examples
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.
Submitted by phamthienan150395 on

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