Bacteria should be it
you didnt include the multipule choice answers so this is a guess but it should be correct
On a hard surface. Your muscles are easier to find and relax on a hard surface lying on your stomach. When you are on a bed, there are many dips and contorts that mold with your body and it is not helpful when getting a massage
Psycho social mean of or relating to the interrelation of social factor and individual thought out an behaver Physical aspect mean to a particular part or feature of something
