Answer: They do not recognize the warning signs.
Step-by-step explanation:
According to the article, when one is dangerously overheated, such person can have an organ failure which can lead to death.
The number of athletes that have died from heatstroke over the last ten years is about two dozens. One reason that young athletes are more at-risk for suffering a heatstroke is due to the fact that they do not recognize the warning signs.