46. What is one way to increase the solubility of sugar in water? Heat the water.
b. Chill the water.
c. Increase the amount of sugar.
d Decrease the amount of water.

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 .

I'm sorry i cant you if you don't list the elements : (

Answer/nitrogen compounds in the soil;