Hypothesize why bog acids react differently with the bones of the bodies than they do with the organs, hair and skin

Hypothesis refers to a proposed explanation for an observed phenomenon. It is a statement which offer a proposition for a phenomenon that has been observed. A scientific hypothesis has to be proofed by carrying out experiment. 
To hypothesize why BOG acid reaction with bone is different from that of organs and the hair, a simple sentence like the one below can be put forward:
BOG acid react differently with bones and skin as a result of the different chemical components that are present in the two body parts.

They can measure  the amount of energy gained or lost

Ido not understand.