The process that involves producing chemicals that aid in the body's breakdown of food

1-response
2-feedback
3-chain reaction
4-secretion

What role does differential reproduction play in natural selection? ! a) some organisms have different reproductive success due to nongenetic traits. b) some organisms have traits that them reach reproductive age. c) different methods of reproduction result in some organisms being genetically altered. d) reproduction varies among organisms due to pathogenic factors. the answer is not a or d based on other posts.

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Select the correct answer from each drop-down menu proteins are