Genetics or lifestyle. Meaning tobacco use, etc.
Volleyball, and Baseball because you need to have power. In volleyball you need power to spike the ball. You need power to hit the ball in baseball.
No we are not all the same as although we all may have ambitions, goals, and dreams, they are not all going to be the same. We are not all equal and throughout the course of history, different communities of people have experienced different things. This is why we have diversity and different cultural values etc
