Abdid is an astronomer who has been observing objects that orbit the sun in the astro belt . he finds a previously undiscovered round rocky object that is not similar in shape to the rest of the asteroids what has abdid most likely found

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 .