Answer:
in my opinion it affected young people because nowadays young ones are addicted to a juul or other vape like things but it can ruin your brain cells
Explanation:
You did not provide the options
Because the more someone exerts themselves the more oxygen and carbon dioxide out put ratio is greater. The more you run and the faster you run the more oxygen you loose which is supplied to your muscles including your lungs.
your strength level and eating habits, knowing what you can do is impotent you don't want to over work yourself. eating also plays a big part in this, eating the wrong things can harm your work out.
the activity and your fitness levels,same as the first part.
Answer: All of the above.
Explanation:
