The process of changing the hard parts of an animal or plant carcass with minerals?

Yes yes yes very good

Ididnt have which of the following as an option. but a negative feedback loops occur in your body through its own internal controller for maintaining temperature ph, hormone levels, blood sugar and other internal variable levels of homeostasis, which is the optimal internal state at which your body operates

Proteins are large macromolecules composed of thousands of subunits: the structure of the protein depends on the sequence of amino acids