The diagram below shows how electricity is generated in a hydroelectric power station.

The flow chart illustrates the

process

of generating

electricity

in a hydroelectric

power

station

. At first glance,

this

process

is made of five stages. At

first

Add a comma

first,

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the accumulation

water

flows to the

power

station

in order to

Add a missing verb

have

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its

power

converted to

electricity

. It can be seen that the

process

of generating

electricity

is done during the day and night.

At the first stage

of

this

process

Add a comma

process,

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the

water

of the river should be accumulated behind the dam which is open during the day to allow

water

flow

Fix the infinitive

to flow

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to the

power

station

.

Then

, there

is

Change the verb form

are

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the reversible turbines which operate

generator

Correct article usage

a generator

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during the day to produce

electricity

. The produced

electricity

goes through the

power

lines and

then

national

Correct article usage

the national

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grid in order to

consuming

Wrong verb form

be consumed

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. After that, the

water

is guided to the low-level reservoir and at night, it goes back to the

power

station

. In the final step, the reservable turbine

pump

Correct subject-verb agreement

pumps

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the

water

into

high-level

Correct article usage

a high-level

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reservoir and it flows to get back behind the dam and the whole

process

is repeated to produce

electricity

constantly.