The diagram below shows a simple system that turn dirty water into clean water. Summarise the information by selecting and reporting the main features, and make comparisions where relevant.

The illustration indicates a process in which dirty

water

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is converted into clean one by using certain equipment.

According to

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the diagram,

it is clear that

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the

Water

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Filter Assembly is made up of a plastic lid, two parts of drums, a linking line between them, and a tap in an exterior shape. Inside a barrel, there are materials to make a drink, but it is not clear what there is in the other. Looking at the picture more closely, the step begins when ordinary

water

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that needs to be cleaned is put into the top of a plastic tank, which is composed of three compounds

such

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as sand, charcoal, and, gravel. At

this

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point, unclean liquid should go through all of these layers in order, and

then

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, the fluid gets down gradually.

After

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this

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phase is completed, it passes a narrow tube connected to a storage container below.

Finally

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, as the clean

water

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arrives at the storage drum, one can drink filtered

water

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, using a tap.