Natural theology describes the idea that the mechanical function of living things is evidence of a divine designer. the natural laws observable currently are responsible for events in the past. differences between individuals cause some to reproduce more effectively than others. life is arranged on a scale from lower to higher forms, with humans at the top of the scale.

option a = the mechanical function of living things is evidence of a divine designer

Explanation:

The study of God's existence has been an important subject for many years. Natural theology is as a result of human reflection upon the created order and upon God's general revelation. The arguments of natural theory are constructed by human beings and it is not a static arguments but a argument that is always evolving as each generation will have their own opinion about the existence of God based on their knowledge and what they can see through nature. For example scientist like Boyle believed that God is a scientist: a mathematician and a being having vast knowledge in  mechanics.

Natural theology is the study of the existence of God through nature. It is believed by many people that the presence of God by things in nature. Things like air, where did it come from, is there a supernatural being behind all of these things we see in nature.