The diagram below shows the development of cutting tools in the Stone Age. Summarise the information by selecting and reporting the main features and make comparisons where relevant.
Figures give information on description of cutting tools used in Stone Age 1.4 million years ago and 0.8 million year ago respectively and provides data on size and shape of those tools.
In general, height of cutting tool, measured from top to center, remained same and changes came in thickness and sharpness of the tools.
By observing front view of the Tool B, we can summarize that cutting tool used 0.8 milion year ago had wider diameter than Tool A which was used 1.4 million years ago. Additionally, end of the tool became sharper with progression of time and this trend can be clearly observed by looking at side view and front view of Tool A and Tool B.
Moreover, Tool B which was used 0.8 million year ago had more number of edges than Tool B. This can be clearly observed by viewing back view of both the tools.
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