If anything, the driving age in this country is way too high. The greatest contributor to teenage accidents is inexperience. When is the best time to learn to drive? As soon as you can reach the pedals (with adult instruction/supervision, of course).
Age has less to do with the likelihood of an accident than driving experience (although there are interesting exceptions).
And it makes sense. At 16, teenagers are getting their first tastes of independence, romantic relationships, drug/alcohol experimentation, etc. Throw on top of all that the fact that most drivers that age have a years experience or less, and it's the formula for catastrophe.
Not teaching your children to drive at a younger age (13 is my rule of thumb) is just setting them up for a disaster. If anything, make a learners permit possible to obtain earlier (13/14), to give young people the time to build up real driving experience (2+ years) before they're fully on their own.
What words should and shouldn't be capitalized?
D. spatial skills
The hypothesis is stating that spacial skills will improve by playing video games. The dependent variable is the variable that is tested and measured. In this hypothesis what is being tested are people's spacial skills to see if they improve after playing video games. Playing video games is the independent variable. In the experiment some people will be playing video games while others will not (control group).