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)
Well because when ur eyes are open for a while the eye gets used to it so when u close it it hurts
Intravenous you just said it lol
They could make a matrial that wolnt rust, and that will not wear down/ break
Answer:
transverse
Explanation:
transverse divides body into upper and lower body
