The mechanism of individual molecules includes selective lock-and key combining with only those molecules with which they both can and must match links. If you understand electron shells and how they are filled, it will make sense. In other words it is just physics that they combine as they do. Now, as to how that complex mechanism grew from mishmashes of elements in a problematic sea, that's a more complex question.

It is also the case that this explanation ignores any function of intentionality from those who are actually living the forms so contrived. There may be a great deal more to this part than meets the eye.

Bill D, they also have to learn about condescension. Fie on you, sir!!


A