Answer:
We breathe in air which has a higher concentration of oxygen than carbon dioxide and we breathe out air with a higher concentration of carbon dioxide. Both the gases are present in the inhaled and the exhaled air.
I wanna say the answer is opening checking accounts
<span>Because Athens assumed an ever-more oppressive role, demanding tribute from league members.</span>
The coach could grade their performance.
Social loafing refers to the fact that a person might not produce much effort when in a group, as opposed when alone. So, these kids know that together they are pretty good, so they don't have to try hard; but when they are alone, they do. In order to prevent this, the coach might want to grade their performance, because then they will try harder.
