What kind of reaction adds water to break large molecules into subunits?

The answer to this question would be : Hydrolysis

Hydrolysis is made from two words, "hydro" that means water and "lysis" that means to unbind. Hydrolysis is a reaction to breaking down a big molecule into smaller molecule using water. It is the opposite of condensation reaction. One example of hydrolysis reaction would be when ATP turn into ADP to provide energy.

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 .