Answer:
BANNER
1.Because of notice we can know the danger warnings
2.We can be safe bacouse of it
POSTER
i dont know (Its just like a banner its also saying warning)
NEWSLETTER
1.with this we can know the news
2.its realy important because if we had a no televition,cellphone or any gadjets we can also know the news
BILLBOARD
1. its also like a adds in tv
sorry but i dont know the next
Explanation:
HOPE ITS HELP
