This shows fear to control because Jack is bullying piggy and in this scene he slaps piggy across the face and his specs fall off and break. Jack is trying to make piggy scared of him.
The description of this island is beauty and peace and its like a perfect place you would want to go visit. But then this plane comes crashing into this beautiful place and it puts a dent in it. It was a nice place you would want to be but after the crash and people are forced to be there, would you want to be there.
Simon is kind of day dreaming here in this scene but it is real. He goes to his special spot like he always does and there is this deep scary voice that is talking to him and this is wear The Lord Of The Flies is introduces in the book. It shows a fear to control because the lord is talking to him and telling him what to do and what is going to happen. etc