Answer:
cantu is a product . i consider this quackery because its unsubstantiated .
Answer:
Independent: electronics in room
Dependent: hours of sleep
Control: school nights, night routine, lighting of room, the time the person decides to go to bed
Confounding: the person(?? not entirely sure on this one)
I know im a kid but showing them some bad after affects of the drug might scare them into not doing it.