Why are dissolved oxygen concentrations higher in the surface ocean than in the deep ocean at both high and low latitudes?.

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 .

Answers are 1,2,4 its correct on edgenuity.

2licl + 3o2 i yook the test and it was correct.