copying genetic material during cell division rejecting a flu vaccine by the immune system perspiring to lower the body temperature learning a new behavior to survive in a new environment
I gave my students this multiple choice question: Which is a feedback mechanism the human body uses to maintain homeostasis?

Only one answer is correct among these 4 choices:
- copying genetic material during cell division
- rejecting a flu vaccine by the immune system
- perspiring to lower the body temperature
- learning a new behavior to survive in a new environment

Could you tell me which one is correct?

perspiring to lower the body temperature