The answer is: An air conditioner that turns on if the temperature gets too hot.
Even though they hurt you emotionally, Negative feedbacks serve their own important function. They keep your feet on the ground and prevent you from getting too arrogant.
This function is similar as a cooling air conditioner. Hot temperature in the comparison above represent your arrogance and the air conditioner represent the negative feedback.
It has smaller surface area so cant use the iodine solution effectively
Malnutrition is the term used for being malnourished, in which a person does not have proper nutrients required for his/her growth