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

is converted into clean one by using certain equipment.

According to

the diagram,

it is clear that

the

Water

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

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

such

as sand, charcoal, and, gravel. At

this

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

then

, the fluid gets down gradually.

After

this

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

Finally

, as the clean

water

arrives at the storage drum, one can drink filtered

water

, using a tap.