What is the comparison of teleology and mechanism?

Question

what are their differences??

Answer 1

teleology would say a person has eyes because he has the need of eyesight - form follows function.  so the mechanism of the eye fits the teleology.  

naturalism argues the opposite : person has sight simply because he has eyes - function follows form (eyesight follows from having eyes).

organisms with eyes may be more successful at interacting with the world.  maybe true in some cases.  fishes in the ocean deeps dont hv eyes as they hv no use for it in such darkness!  so the mechanism will fit with the environment.

the human body is a good teleological mechanism!