Heat stroke is the most serious heat-related illness. It occurs when the body becomes unable to control its temperature: the body's temperature rises rapidly, the sweating mechanism fails, and the body is unable to cool down. Body temperature may rise to 106°F or higher within 10 to 15 minutes.
The diferrence between the two is Santa Fe Trail was used by traders to cross the Great Plains and the Old Spanish Trail was used by traders to reach California.
Cardiac glycosides is the answer
The components of skill-related fitness are heredity, practice, and specificity. Whilst heredity is unable to be changed, it sets the baseline for practice (to improve specific skills or groups of skills) and specificity, to hone in your practice to one focus.
They are more likley to do work and get along with other workers.
Also this is more of a business question