Because it doesn’t make a story it is a statement
The answer is gained because monuments can not force you to do something, but people can look at the monument
1. An article in a news magazine titled " Fences wont stop illegal immigration"
Purpose: to persuade
2. "The iPhone versus the Android ; Which one is best ?'' - an article in a computer magazine
Purpose: to evaluate
3. An article in a newspaper titled " Entire city Installs solar panels on its Homes"
purpose: to inform
4. "Current trends : The Decline of Marriage '' - an article in a popular science magazine
purpose: to analize