DRAG AND DROP Matter from space can __
to form a nebula or matter from a star can __
to form a nebula

condense
warm
explode
cool

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 .

Cause its being chemically applied?

Ithink that one is (c)