I want to know the answer to the following question:
One possible reason for the development of the circadian system is the need to counteract what ?
All the background I'm provided with is that "The current view is that circadian changes in environmental oxygen levels and the production of reactive oxygen species (ROS) in the presence of daylight are likely to have driven a need to evolve circadian rhythms to preempt, and therefore counteract, damaging redox reactions on a daily basis.". Is that enough to answer the question?