Why did God create this complexity? If God designed the universe and designed the rules governing the universe, he would have been free to design anything he wanted to. Why create the need to eat, causing billions of deaths a year. Why create the need to breathe, making living at high altitude difficult, and swimming difficult. Why go to the bother of creating animals that convert oxygen into carbon dioxide, and plants that convert carbon dioxide into oxygen. Designing this need required designing chlorophyll, alveoli and photophosphorylation. God designed the requirement for respiration, and then designed ways to solve this requirement. It is complexity, but if it is Designed, it?s unnecessary complexity.