When an athlete's body temperature rises, the body cools itself through the evaporation of sweat from the skin's surface. The correct option is C.
An athlete is a person who plays sports professionally and involves in daily and heavy physical activity. They do daily training and participate in many sports events.
Body temperature is the normal temperature at which the process of the body occurs. The normal temperature is 38 F. Above this temperature, the body doesn't feel good.
To maintain the temperature of the body, there are many functions, like sweating. When the athlete's heart rate increases, the body began to sweat to cool the temperature.
Thus, the correct option is C, evaporation of sweat from the skin's surface.
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