Pinky put her wet clothes inside the room for drying. But her mom told her to put it under the sun. Give reason why her mom told her to put it out in the sun instead of indoors.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

The correct answer is "hydrogen".