Research states that the brain is sensitive to the electromagnetic radiation from cell phones, and can even stimulate brain activity.
A. Speed
Amphetamine, a stimulant, is commonly reffered to as 'Speed'
Physical barrier to protect us from pathogens
There is loads of choices so I could not really tell what the best one is. Although I wouldn't know because I'm a guy so I cant really tell what the best one is. I did look that question up and loads showed up on the right of my screen.
Sorry