Maslow believes that a person must first satisfy lower needs before they'll be motivated to satisfy higher needs. The highest need in Maslow's hierarchy is the need for self-actualization. Before one can achieve this, one must satisfy all the lower needs first (physiological, safety, love/belongingness/self-esteem).
One is not highly visible and the other is visable
To ensure access to clear and complete documentation
I'm pretty sure it's to boost dental health. fluoride is used to prevent cavities and tooth decay, so i'm assuming its option 3.
