Group 4

The topic is the ues of helmet. Although our government has already legislated the law of wearing helmet on motorcycle, most people still refuse to wear it because of their hair style and it's inconvenient mentioned in the PSA so that many fatal accidents take place.
At first, the sound effect indicates the topic. Some horrible pictures have the function to warn people to wear helmet; otherwise, no helmet no chance!
Generally speaking, print ads are very clear about the topic.