How does the director Steven Spielberg use filmic techniques to build suspense for the audience in the film 'Jaws'?

Jaws is a film directed by Steven Spielberg in 1975. He also directed the films 'E.T' 'Groonies' and 'close encounters'. The film starts of underwater to let you know both the setting and what type of thriller it could be. The film Jaws is about   a great white shark who is attacking the population. However the mayor of the beach does not want to close the beach because of the business, so he argued to keep it open.

The music has a 2 beat bar. In the opening credits the music is deep cellos and violins building up with the tension of the shark getting closer and closer towards the girl swimming in the ocean. When the shark is closing in the music builds up and gets faster and louder. The music is very iconic and it starts off quite quiet and slow in my opinion and then it builds up and gets faster and louder as the shark approaches closer. Every time the shark comes into a position where there could be an attack the music builds up more and more. This shows the audience that whenever the music comes on they should get ready for something bad to happen.

At the beginning the boy called Alex is on his lilo in the water. The camera shot is shown as though you are the shark gliding thorough the water towards him. Towards the end of the   sequence you see the boy kicking his legs and splashing in the water and you hear the screams for help which creates suspense for the audience.