Preservation Aid is a job title that refers to the use of Saran, which is a five-letter word. Saran is a type of plastic wrap that is used to protect food and other items from moisture and air. It is also used to keep food fresh for longer periods of time. Preservation Aid workers are responsible for using Saran to help preserve food and other items. They must also ensure that the Saran is properly applied and stored in order to maximize its effectiveness.