Violence and death and violence
The answer is strong refusal skills. A teen who has been properly raised would know the difference between right and wrong and has a sense of directions to what he or she wants to do with his or her life. They have the decision to put themselves in that position. No amount of peer pressure would force a strong youth to take drugs when he or she is capable of taking charge of his or her life.
The second point seems intuitive but there is a surprising lack of evidence showing that the increase in muscle size contributes to an increase in voluntary strength. If individuals increased both muscle size and strength, the conclusion is often that muscle growth played a role.
1, 2& 4th bullet I think is correct