Why doesn't the Earth usually feel solar winds? A. because of the aurora borealis
B. because of its strong magnetic field
C. because of strong magnetic activity inside the Sun
D. because they contain electromagnetic radiation

Answer is B

the magnetosphere deflects most of the charged particles and shields our planet's surface

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 .