Turning up the temperature setting in a room that feels cold,causing a heater to turn on is an example of the principle of:

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Negative feedback is a control mechanism which maintains a stable or constant internal environment within an organism or system. It works by reversing any changes that occur from the normal or desired state, as in the case of turning up the temperature setting in a room. When the temperature in the room drops below the set point, the heater turns on to restore the desired temperature. This helps to maintain homeostasis, a state of balance or stability in the internal environment of an organism or system. Positive feedback, on the other hand, amplifies or reinforces a change rather than reversing it, and can lead to instability or deviation from the desired set point. Directional control is not a principle that applies to this scenario.

Turning Up the Temperature Setting in a Room That Feels