Please someone help, I’ll reward points + brainalist

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

The third stage of cellular respiration is (2 points)

A(n) is a molecule influences the way that a molecule reacts.