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The image displays two diagrams featuring primitive tools labeled Tool A and Tool B, each presented with three distinct perspectives comprising front view, side view, and back view with a 5cm scale. Tool A, dating back 1.4 million years ago, showcases an asymmetric design with a broad, uneven base narrowing towards a jagged peak. Tool B, originating from 0.8 million years ago, exhibits a refined, symmetrical teardrop shape with a pointed top and a broader, smoother base.
Given the complexity of the image, the above description may not be entirely accurate.
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The diagram illustrates the development of the cutting tools in the stone age, 1.4 million and 0.8 million years before.
Overall,as can be seen,stone tools experienced a significant transformation from unsymmetric to sharper and easier stone over the period.
Back to 1.4 million years ago, there was cutting tool A,which was small and not sharp enough.Moreover,its front view was rough and narrow with length approximately 8 centimeters.
However,dating back to 0,8 years ago cutting tool B was observed.Its front view was wider and side view was sharper and comfortable to use,and length of new tool became nearly 13 centimeters.
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