The muscle pulling on a bone often works like a type of simple machine called a lever. Most of the bones of the limbs (arms & legs) act as levers for the body. I hope that this is the answer that you were looking for and it has helped you.
C. Convection.
That is the process you are describing.
It is a scientific name whereby each species receives Latin or Latinized name of two parts. The first indicating genus and the second being a specific name.
