Some sea walls are recurved, like the one shown in the video. The aim of the recurved wall is to deflect the energy of the wave. (+)

 

They are effective in protecting cliffs from erosion. (+)

 

They act as a barrier to prevent flooding. (+)

 

The disadvantages of sea walls are that they are expensive to construct and maintain. (-)

 

They also create a strong backwash which can erode under the wall. (-)

 

DO YOU SEE ANY OTHER FEATURE IN THE VIDEO?

(Hint: What is in front of the seawall?)