The key answer of exercise 2

The escalators to move shoppers between the floors are at two ends of a mall, forcing people to walk past all the shops on a floor. Glass safety barriers on the first floor allow consumers to easily see the shops above and below them. Open shop fronts, with their big glass windows removed, make it easier for people to enter them. Huge glass ceilings to let in as much natural light as possible and the use of artificial light makes shoppers unaware of the passing of time. Holding different events every week and local festivals in the space inside the mall brings in more people.