A piston ring is a round component that is located between the piston and the cylinder and it helps to prevent that the combustion gas leaks through the opening between the piston and the cylinder and this allows the engine to work efficiently. Because of this, the engine component that forms a tight seal between the piston and the cylinder and is necessary for proper engine operation is the piston ring.
A line graph can show how both the movie and the novel are compared to each other. It can give a visual of both mediums of the story rather than one or the other. Hope this helped :)
