Answer:
Gases we Breathe Out
It is the same air that we inhale. ... The amount of inhaled air contains 21% of oxygen and 0.04% of carbon dioxide, while the air we breathe out contains 16.4% of oxygen and 4.4% of carbon dioxide.
B,c and f are true,but I doubt about g cause I don't know anything about electron's dimention
First option.
The male tails are more attractive because of their long feathers , meanwhile the female tails are shorter than expected!
