What is the key reason for preventing our body temperature going too high or too low?
At the organism level, the human body will sweat when it senses the internal body temperature is too high. When you sweat, this moisture on your skin will evaporate. This evaporation process is the body way of removing heat. The human boy will shiver to produce more heat when it senses he body temperature is too low. Any extra movement will produce heat. The body must stay at a safe range in temperature for the organism to function efficiently as a whole.