You are presented with the question "What are chemical messengers that are catalysts in the body?" and the following answer choices: 
- allow growth
 - acetic acid
 - fibers
 - photons
 - fever
 - hormones
 - proteins
 - genes

Now knowing that hormones are chemical messengers that control many body functions and vitamins function as catalysts in chemical reactions in the body, choose the best answer.


 

      hormones   