The answer is puberty :) because you reach sexual maturity when you hit puberty, thus being able to reproduce.<span />
<span>Friction is the resistance when one surface or object encounters another. </span>
2-3 days cause that's how long it is for me
Cardiovascular is running and getting your heart rate up. You need to get your heart rate up to maintain a healthy heart rate. If you were never getting your heart rate up how do you expect to be able to stay healthy? You can't because you're not doing any physical activity.
A. Getting a taxi etc. to take you home safely
B. Asking a trusted friend that is sober
C. Asking your parent(s)