When too high or too low physiological activities cease?

I believe the answer is: because metabolic reactions proceed too fast or slow

because of this, the Body temperature would be changed along with it. When the metabolic reactions proceed too fast, the body temperature of the person would increase above normal. When the reactions are too slow, the temperature would be reduced below normal.

9) a & b

10) true.

11) false.

12) false.

13) true.

14) false.

15) true.

16) true.

don't worry, i'm here to you with your struggles!

good luck!