The diagrams below show two cutting tools made from stone. They are from an early period and a later period of human history. The tools were made by breaking off small pieces of stone.

The provided diagram illustrates two different cutting tools that are produced by tiny pieces of stone from various times in human history between the early period and the later period.

Overall

,

Tool

A which is from the early year period was smaller than

Tool

B

which is from the later year,

while

Tool

B

has a symmetrical shape and its size is bigger than

Tool

A on both the front and back views. On the side

view

the stones diagram shows

Tool

B

's structure was sharper than

Tool

A's. The picture of

Tool

A depicts an unsymmetrical form in the front

view

and its size is about 7 centimetres. On the back

view

, the illustration shows an uneven texture at the border of the

tool

and on the side

view

of

Tool

A

that

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gathered

by

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a small piece of rock into a

tool

. For

Tool

B

, the front

view

drawing illustrates a symmetrical water drop shape and its length of approximately 10 centimetres.

The

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On the

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back of the

tool

, are some little rocks that combine with the

tool

and

also

its form has a smoother border than

Tool

A which makes

Tool

B

look completely in perfect condition.