As an environment changes, and some organisms have a higher fitness than others, natural selection acts directly on a. existing variations.
b. genetic material.
c. acquired traits.
d. individual organisms.

this is a good question! i'll do some research and come back when i have the answer!

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.