Gene therapy replaces nonfunctioning genes with the normal, functioning copy. It helps people who have genetic diseases and such to live a more normal life. Hope this helps! :)
Answer:
c. disruptive selection
Explanation:
Disruptive selection is the changes in population genetics favouring extreme values for a trait over intermediate ones.
It's also called diversifying selection as it cause a population to become reproductively distinct from the parent population.