Answer and explanation:
We are given descriptions of different types of blogs and we are to math them with their main purpose.
1. a blog instructing readers how to create various hairstyles - to entertain
(people having interest in learning to create hairstyles may watch it for entertainment)
2. a blog supporting cell phones for students in schools - to argue
(since different people will have varying opinion about students carrying and using cell phones in schools so this will form an argument)
3. a blog sharing a video for a band's latest song - to inform
(the blog is sharing the latest video and informing the people about it)
4. a blog listing the daily specials and discounts for a restaurant - to advertise
(the blog lists the daily specials and discounts for a particular thus advertising it to catch more customers)
