Sixteen-year-old rashad is on his high school diving team. while they are practicing, a group of girls from the girls' swim team stop by. rashad immediately tries increasingly risky dives while the girls watch. if rashad's hormone levels were checked at that time we are likely to find

If Rashad's hormone levels were checked at that time we are likely to find an  "increase in his testosterone level".

Testosterone are the hormones which cause the male sexual development, and given the situation where he is trying to impress the girls with his risky dives points to the rise of the hormone encouraging him to do all that.