The scenes in the story are linked together, creating the written path for the character to travel, giving the story the needed structure to sustain itself and the reader until the final scene. This is important to the writers who carefully plot, and to to those who write off the cuff. The story arc is like a three act play. Act one is the story up til now. It introduces the character's normal life as it is now. We are introduced to the need for change. Towards the end of the act, the character is put on the path toward change, like it or not.
Act two enters and we see the new life of the character, who struggles toward the story goal, against any number of obtacles. In act three, things start to come together, then a damaging black moment occurs before the change can finally take place.
I'm busy working on my blog posts. Watch this space!