Exposition - Should 7 year olds have to sit in a booster seat?

I believe that children should at 7 years old should sit in a booster seat in a car.

Firstly, there is a greater chance that you can fly out of the window. Secondly, if you don't sit on a booster seat you can slip out of the seat. Finally, the seatbelt can cut across your neck.

Children at 7 years of age should sit in a booster seat because it is safer.