Moral principles that govern behavior or the conducting of an activity
From what i heard, when carbon monoxide is in a person's blood (smoker or non smoker) it can kill you, it is a sign of poison in your blood. With smokers it is worse because they are smoking something that has a high content of carbon monoxide which can cause heart problems, lung cancer, birth defects, etc. So thats what i think
That would have to be ivan pavlov because b.f. skinner was the man who taught behavioral sciences.
There are more than 3 million US cases per year
A. The balance needed to hold a handstand without falling.
Skill-related fitness is something that your body needs to be trained to do and need focus to complete. The other answer options are your body's physical capability rather then something that takes skill and needs practice, such as balance.