What is heredity? The passing of
traits from animal
to animal
The passing of
traits from
offspring to
parents
The passing of
traits from parents
to offspring
The passing of
traits from
Generation X to
Generation T.

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 .

Ithink that the answer is b