'colored feathers that camouflage birds from predators are found in the majority of the current bird population' would be correct since that would only focus on one species instead of many, natural selection includes all species, not just one.
First question: “Every system in the body relies on oxygen. From cognition to digestion, effective breathing can not only provide you with a greater sense of mental clarity, it can also help you sleep better, digest food more efficiently, improve your body's immune response, and reduce stress levels.” -google
7 days per quarter that’s why we have 7 days in a week... that was totally bs I made it up
The answer is called respiration. Hope this helps.
