Answer:
something that isnt from a living thing. Such as a table falling.
It is possibly C because it has the jaws in front but not near the limbs.
The correct answer is an active site.
The active site, in biology, refers to the region of an enzyme where the molecules of substrate combine and goes through a chemical reaction. The active site comprises of the residues, which produce temporary bonds with the binding site (substrate) and residues that catalyze a reaction of that substrate, that is, the catalytic site.