The answer for Part A is: In an action-reaction pair the forces work on different objects.
Well collagen is a globular protein with a tertiary structure. when you heat it up the energy will break the bonds that form between the chains of amino acids such as hydrogen and ionic bonds which will cause the shape of the collagen molecule to change and become less ridged and stable and more fluid.
hope that helps
The y axis gives the DEPENDENT VARAIBLE
It assures that your body and mind is in a good place
