THAT SOME LIVING THINGS BECAME CAPABLE OF
COMPLEX INSTINCTUAL BEHAVIOR

No thought is involved when a muscle contracts because an electrical shock has been applied. That is pure "stimulus and response" and can be explained in terms of electrochemistry. It is not related to the Fifth Miracle.

If a worm contracts upon touch, is it the same? Who knows, but maybe there's at least the beginning of something beyond "stimulus and response."

A bird building a nest that is right for its species, even though it's never seen such a nest, is using its mind in a way far exceeding "stimulus and response."  Information on how the nest should be built is encoded in the bird's DNA molecules -- encoded in terms of atom positions on the molecules. That physical positions of atoms on molecules can give rise to abstract notions such as that of a bird's nest, and then that nest actually gets built...  is miraculous -- the Fifth Miracle.

MORE INFORMATION:

• Suite101.com has a page called Innate Behavior.
• Wikipedia provides a page entitled Instinct.