Your nerves send feedback to the brain to tell you what you are touching. I suppose that is a feedback mechanism. I dunno if it is entirely helpful.
Organisms who happen to be best suited to an environment and reproduce most successfully will be consider successful in terms of natural selection.
I would say that it is B. thinner.
C. theory is the answer to your question
The angle of jaw and type of teeth in each jaw are the main big differences.
