i really need it by tomorrow this question is 60 points :) and if you answer it i’m gonna like all of you questions you have answered! p. s click the picture to see it all of the questions are there

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 .

Answer heart of american                  live in harmony                    hillsides of orchards                    blaze of color                    backdrop of pines;