The fact "a fan is used for blowing air" is illustrated with the story:1. Kelly decided to clean out her attic.2. She had not been in her attic for a long time and it was a mess.3. She opened the attic door and went into the attic.4. The air in the attic was stagnant, musty, and difficult to breathe.5. Kelly opened a window and plugged in fan to help circulate the air in the attic.