The diagrams illustrate a mechanism which produces electricity from seawater .
  
Overall
,a structure is located in the sea and uses its water.The first picture shows that the Linking Words
wind
 which is caused by Use synonyms
waves
 spins a turbine and produces  light.Use synonyms
On the other hand
,the second picture illustrates that Linking Words
waves
 cause the Use synonyms
wind
 which is in the opposite direction and by ,Use synonyms
this
 the  light produces too.
  Linking Words
Firstly
,the machine is on a cliff or a sea wall.Linking Words
This
 place provides the best way for  collecting   wave power.In the first ,picture Linking Words
waves
 blow the Use synonyms
wind
 inside the structure.At the top of it is the chamber which probably is used for controlling the high of the wave.Use synonyms
However
,The air that goes through the column makes the turbine spin.By ,Linking Words
this
 the turbine makes the energy which provides  electricity.
  Linking Words
Secondly
,the second photo shows that when Linking Words
waves
 ebb they cause the Use synonyms
wind
 too.Use synonyms
Moreover
,It goes through the column again and spins it in the same direction,providing the light again.Linking Words