I believe A. Nitrogen is the most abundant Gas.
Oxygen cycle The cycling of oxygen between the biotic and abiotic components of the environment (see biogeochemical cycle). ... In the process of respiration oxygen is taken in by living organisms and released into the atmosphere, combined with carbon, in the form of carbon dioxide.
A pituitary glad tumor releasing too much hormones
No more than 7% of your total calories should come from saturated fats.
