The diagram below illustrates how a simple water filter is constructed and how it functions to produce clean drinking water. Summarize the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

The flow diagram explains the operation of how

water

is filtered to produce drinking

water

and the construction of

water

Correct article usage

the water

show examples

filter

briefly

Rephrase

apply

show examples

. There are two main structures, which

is

Correct subject-verb agreement

are

show examples

a

water

filter

containing three

filter

layers, and a

storage

to store clean

water

. The impure

water

is needed in the first step. The container stores three

filter

layers, which are sand, charcoal and gravel; they are placed from top to bottom of the

filter

, respectively. It is supposed to be the

water

filter

. Another is a drinking

water

storage

tank. It stores the clean

water

which is ready to serve

to

Change preposition

apply

show examples

people. The

filter

and the

storage

are linked by a long pipe.

To begin

the filtering procedure, the impure

water

is stored in a big container.

Next,

Firstly

,

water

is filtered by sand,

secondly

, charcoal helps the process,

following

this

, gravel is the

last

assistance of the

filter

. In the subsequent stage, the clean

water

Add a missing verb

is discharge

show examples

discharge

Replace the word

discharged

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to the drinking

water

storage

tank through the long pipe.

Overall

,

it is clear that

drinking

water

can be produced in two main steps

by

Change preposition

apply

show examples

a

water

filter

and a

storage

.