What may likely to happen with the snakes If the rats decrease in
number?

The snakes will inter to cities and snakes may be one of the biggest physical factors of the displacement of people around the world. I hope it answers your question. Keep asking

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 .